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added 9 characters in body

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edited Jun 16, 2018 at 18:32

05AB1E, 88 7 bytes

vyLN+èOˆεL¾+èO¼

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Explanation

ε        # apply to each element x of the input
 L       # push range [1 ... x]
  ¾+     # add counter to each (initially 0)
    è    # cyclically index into input with each
     O   # sum
      ¼  # increment counter

05AB1E, 8 bytes

vyLN+èOˆ

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05AB1E, 8 7 bytes

εL¾+èO¼

Try it online!

Explanation

ε        # apply to each element x of the input
 L       # push range [1 ... x]
  ¾+     # add counter to each (initially 0)
    è    # cyclically index into input with each
     O   # sum
      ¼  # increment counter

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created Jun 16, 2018 at 18:22

Emigna

05AB1E, 8 bytes

vyLN+èOˆ

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