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Uiua Factorial ← ⧅≠⟜∘ Read as: Factorial ← # Factorial gets: ⧅≠ # tuples inequality ⟜∘ # on identity. Alternatively, ⧅≠ can be read as "count permutations of l …

Uiua, 15 bytes ⍜⊕□◌.⊞+⟜⇌⇡⌈÷2⧻. Try it: Uiua pad This should be 13 bytes because ⍜⊕□◌. could hypothetically be replaced by ⌝⊕□, but it hasn't been implemented yet. Explanation: ⌈÷2⧻ - Get the side len …

Uiua, 24 bytes ⨬⍜(-1°⊂⇌base3|⊙↘⟜¯¬)0⊸<2 Try it: Uiua pad. The comment # Experimental! enables the experimental base function, which has not yet been stabilized. Explanation: A very elegant use of the …

Uiua, 29 bytes ∧(◿10≡/+◫2&p⊂↯:@ ⊙⊸/$"_ _")°⊏ Try it °⊏ # range of 0 to the input's length ∧( # fold over this (N), with the input as the initial value: ⊙⊸/$"_ _" # to the value, …

Uiua, 4 bytes ⊞=.⇡ Try it online! Read: ⊞ table of = equality by . two copies of ⇡ the numeric range 0 to the input.

Uiua, 13 bytes ⍥⬚0(⊂≡⊂..)9¤1 Try it! Here's the output, you can get more iterations by changing the 9 to a higher number. Explanation: Starting with [1], 9 times do: duplicate horizontally, and prep …

Uiua, 12 bytes =/+ⁿ⧻.-@0°⋕. Try it Explanation: -@0°⋕. Convert the number to a list of digits. ⁿ⧻. Raise each to the power of the list's length. =/+ Is this list's sum equal to the original?

Python, 32 bytes f=lambda n,i=1:n==i or f(n,2**i) Attempt This Online! My idea was invalid in JS, because the recursion limit isn't guaranteed, but it's OK in Python because of that difference. Outpu …

Thunno 2, 7 bytes ×__Fæ2> Attempt This Online! Based on Command Master’s idea, implemented a bit differently × # Multiply. X * Y _ # Swapped subtract. X * Y - X _ # Swa …

JavaScript (Node.js), 28 bytes (x,y,z)=>x<=y?y:x>y&y<=z?z:x Attempt This Online! Literal translation of the simple version.

TypeScript's type system, 97 bytes //@ts-ignore type M<A,B,T=[]>=A extends[...B,...infer I]?M<I,B,[...T,1]>:A extends[1]|[]?A:M<T,A> Try it at the TypeScript playground! I/O is unary numbers / tuples …

Check that answer for a better understanding of the math. Code explanation: 2 4000:a?:b) 2 4000 # Push 2, 4000 to the stack. :a # Store 4000 in variable a. ? …

Python, 100 bytes from decimal import* getcontext().prec=500 e=d=Decimal(1) for x in range(2,254):e+=1/d;d*=x print(e) Attempt This Online! -2 bytes thanks to RubenVerg 254 is the lowest number which …

GolfScript, 6 bytes 55,(;5 Try it online! Prints the first 100 digits. 55, # the list 0..55 (; # drop the 0 5 # push 5 to the stack # the stack is implicitly printed without separator Al …

Vyxal 3L, 2 bytes /* Try it Online! Fold / the input by multiplication *. Fold treats whole numbers as the range from 1 to n. The factorial built-in is 4 bytes: fact