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Search: id:A112851
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| A112851 |
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a(n) = (n-1)*n*(n+1)*(n+2)*(2*n+1)/40. |
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+0
2
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| 0, 0, 3, 21, 81, 231, 546, 1134, 2142, 3762, 6237, 9867, 15015, 22113, 31668, 44268, 60588, 81396, 107559, 140049, 179949, 228459, 286902, 356730, 439530, 537030, 651105, 783783, 937251, 1113861, 1316136, 1546776, 1808664, 2104872, 2438667, 2813517, 3233097
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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A112851 is the fourth sequence in A112852.
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MAPLE
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a:=n->sum(j^4-j^2, j=0..n)/4: seq(a(n), n=0..36); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 08 2008
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MATHEMATICA
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a[n_]:=(n-1)n(n+1)(n+2)(2n+1)/40; Table[a[n], {n, 30}] (Locker)
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CROSSREFS
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Partial sums of sequence A006011.
Cf. A112852.
Sequence in context: A067002 A110450 A102832 this_sequence A034490 A071351 A083231
Adjacent sequences: A112848 A112849 A112850 this_sequence A112852 A112853 A112854
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KEYWORD
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easy,nonn
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AUTHOR
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Alford Arnold (Alford1940(AT)aol.com), Sep 24 2005
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EXTENSIONS
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More terms from Josh Locker (jlocker(AT)mail.rochester.edu) and Michael W. Motily (mwm5036(AT)psu.edu), Oct 04 2005
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