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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

2-magic 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

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Last modified November 25 23:11 EST 2014. Contains 250013 sequences.