3 added 292 characters in body
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SOGL V0.12, 7 5 4 bytes

ē»«I

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Explanation:

ē»«I
ē     push counter, then increment it.
      First time running this will push 0, then 1, then 2.
             TOS on each: 0  1  2
 »    floor divide by 2   0  0  1
  «   multiply by 2       0  0  2
   I  and increment       1  1  3

SOGL V0.12, 7 5 4 bytes

ē»«I

Try it here!

Try it doubled!

Try it tripled!

SOGL V0.12, 7 5 4 bytes

ē»«I

Try it here!

Try it doubled!

Try it tripled!

Explanation:

ē»«I
ē     push counter, then increment it.
      First time running this will push 0, then 1, then 2.
             TOS on each: 0  1  2
 »    floor divide by 2   0  0  1
  «   multiply by 2       0  0  2
   I  and increment       1  1  3
2 deleted 21 characters in body
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1
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