

A052459


a(n) = n*(2*n^2+1)*(n^2+1)/6.


3



1, 15, 95, 374, 1105, 2701, 5775, 11180, 20049, 33835, 54351, 83810, 124865, 180649, 254815, 351576, 475745, 632775, 828799, 1070670, 1366001, 1723205, 2151535, 2661124, 3263025, 3969251, 4792815, 5747770, 6849249, 8113505
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OFFSET

1,2


COMMENTS

2magic series constant.


LINKS

Table of n, a(n) for n=1..30.
Eric Weisstein's World of Mathematics, Magic constant.
Index to sequences with linear recurrences with constant coefficients, signature (6,15,20,15,6,1).


CROSSREFS

Cf. A052460, A052461.
Sequence in context: A114240 A189657 A190274 * A044266 A044647 A232296
Adjacent sequences: A052456 A052457 A052458 * A052460 A052461 A052462


KEYWORD

nonn,easy


AUTHOR

Eric W. Weisstein


EXTENSIONS

Formula from Vladeta Jovovic, Jun 15 2002


STATUS

approved



