login
A100855
a(n) = n*(n^3-n^2+n+1)/2.
2
0, 1, 7, 33, 106, 265, 561, 1057, 1828, 2961, 4555, 6721, 9582, 13273, 17941, 23745, 30856, 39457, 49743, 61921, 76210, 92841, 112057, 134113, 159276, 187825, 220051, 256257, 296758, 341881, 391965, 447361, 508432, 575553, 649111, 729505, 817146, 912457
OFFSET
0,3
REFERENCES
T. A. Gulliver, Sequences from Cubes of Integers, Int. Math. Journal, 4 (2003), 439-445.
FORMULA
G.f. x*(1+2*x+8*x^2+x^3) / (1-x)^5 . - R. J. Mathar, Jun 15 2011
PROG
(Magma) [n*(n^3-n^2+n+1)/2: n in [0..40]]; // Vincenzo Librandi, Jun 15 2011
(PARI) a(n)=n*(n^3-n^2+n+1)/2 \\ Charles R Greathouse IV, Oct 21 2022
CROSSREFS
Sequence in context: A362300 A131211 A213131 * A375883 A256860 A221036
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jan 15 2005
STATUS
approved