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0, 0, 1, 18, 108, 400, 1125, 2646, 5488, 10368, 18225, 30250, 47916, 73008, 107653, 154350, 216000, 295936, 397953, 526338, 685900, 882000, 1120581, 1408198, 1752048, 2160000, 2640625, 3203226
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..600
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FORMULA
| a(n) = sum(j=1..n-2, sum(i=1..n-2, (i^3+j^3)/2 ) ) - Alexander Adamchuk (alex(AT)kolmogorov.com), Oct 24 2004
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MATHEMATICA
| Table[n^2*(n-1)^3/4, {n, 0, 100}]
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PROG
| (MAGMA) [n^2*(n-1)^3/4: n in [0..60]]; // Vincenzo Librandi, Apr 26 2011
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CROSSREFS
| Sequence in context: A002165 A008654 A060787 * A041622 A160765 A192511
Adjacent sequences: A019581 A019582 A019583 * A019585 A019586 A019587
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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