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The challenge involves mathematics. Also consider using more specific tags: [number] [number-theory] [arithmetic] [combinatorics] [graph-theory] [geometry] [abstract-algebra].

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Lua, 141 bytes n,s=1,'-1 1'function g()repeat n=n+1 until s.find(n,4)==z and n~=13 return n end for i=4,io.read(),2 do s=g()..' '..g().."\n"..s end print(s) Ungolfed n,s = 1,'-1'1' --n is the curr …
answered Jan 30 '16 by QuertyKeyboard