A032520 Sum of the integer part of 13/3-th roots of integers less than n.

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116

Offset

0,3

Links

Table of n, a(n) for n=0..68.

Mathematica

Accumulate[Table[Floor[Surd[n^3, 13]], {n, 0, 70}]] (* Harvey P. Dale, May 03 2015 *)

Crossrefs

Sequence in context: A138234 A324720 A247756 * A034837 A096105 A178157

Adjacent sequences: A032517 A032518 A032519 * A032521 A032522 A032523

Keyword

nonn

Author

Michel Tixier (tixier(AT)dyadel.net)

Status

approved