A059291 a(n) = round((n-1)^2*(n+5)/144).

0, 0, 0, 0, 1, 1, 2, 3, 4, 6, 8, 11, 14, 18, 22, 27, 33, 39, 46, 54, 63, 72, 83, 94, 107, 120, 135, 150, 167, 185, 204, 225, 247, 270, 295, 321, 349, 378, 409, 441, 475, 511, 549, 588, 629, 672, 717, 764, 813, 864, 917, 972, 1030, 1089, 1151, 1215

Offset

0,7

References

L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 120, see P(n,4).

Links

Harry J. Smith, Table of n, a(n) for n = 0..1000

Mathematica

Table[Round[(n-1)^2*(n+5)/144], {n, 0, 50}] (* G. C. Greubel, Jan 04 2017 *)

Prog

(PARI) a(n) = { round((n - 1)^2*(n + 5)/144) } \\ Harry J. Smith, Jun 25 2009
(Magma) [Round((n-1)^2*(n+5)/144): n in [0..80]]; // Vincenzo Librandi, Jan 05 2017

Crossrefs

Cf. A001400, A059290.

Sequence in context: A071764 A238381 A290743 * A177339 A075535 A238383

Adjacent sequences: A059288 A059289 A059290 * A059292 A059293 A059294

Keyword

nonn

Author

N. J. A. Sloane, Jan 25 2001

Status

approved