|
| |
|
|
A071252
|
|
n*(n-1)*(n^2+1)/2.
|
|
1
|
|
|
|
0, 0, 5, 30, 102, 260, 555, 1050, 1820, 2952, 4545, 6710, 9570, 13260, 17927, 23730, 30840, 39440, 49725, 61902, 76190, 92820, 112035, 134090, 159252, 187800, 220025, 256230, 296730, 341852, 391935, 447330, 508400, 575520, 649077, 729470, 817110, 912420
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,3
|
|
|
REFERENCES
|
T. A. Gulliver, Sequences from Arrays of Integers, Int. Math. Journal, Vol. 1, No. 4, pp. 323-332, 2002.
|
|
|
LINKS
|
Vincenzo Librandi, Table of n, a(n) for n = 0..2000
|
|
|
FORMULA
|
a(n)= floor(n^5/(n+1))/2.- Gary Detlefs, Mar 31 2011.
|
|
|
MATHEMATICA
|
f[n_] := n (n - 1) (n^2 + 1)/2 (* Or *) f[n_] := Floor[n^5/(n + 1)]/2; Array[f, 38, 0] (* Robert G. Wilson v, Apr 1 2012 *)
|
|
|
PROG
|
(MAGMA) [n*(n-1)*(n^2+1)/2: n in [0..40]]; // Vincenzo Librandi, Jun 14 2011
|
|
|
CROSSREFS
|
Sequence in context: A187275 A164015 A128302 * A174002 A030506 A062990
Adjacent sequences: A071249 A071250 A071251 * A071253 A071254 A071255
|
|
|
KEYWORD
|
nonn,easy
|
|
|
AUTHOR
|
N. J. A. Sloane, Jun 12 2002
|
|
|
STATUS
|
approved
|
| |
|
|
