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Search: id:A033488
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| 0, 4, 20, 60, 140, 280, 504, 840, 1320, 1980, 2860, 4004, 5460, 7280, 9520, 12240, 15504, 19380, 23940, 29260, 35420, 42504, 50600, 59800, 70200, 81900, 95004, 109620, 125860, 143840, 163680, 185504, 209440
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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n*C(3+n, 3). - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jan 10 2006
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MAPLE
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[seq(4*binomial(n, 4), n=3..35)]; - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Nov 24 2006
a:=n->(sum((numbcomp(n, 4)), j=1..n)):seq(a(n), n=3..37); [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Aug 24 2008]
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MATHEMATICA
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f[n_]:=n*(n+1)*(n+2)*(n+3)/6; lst={}; Do[AppendTo[lst, f[n]], {n, 0, 5!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Jul 21 2009]
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CROSSREFS
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1/beta(n, 4) in A061928.
Cf. A000332, A034827, A050534.
Sequence in context: A127920 A060122 A066970 this_sequence A018211 A135507 A131479
Adjacent sequences: A033485 A033486 A033487 this_sequence A033489 A033490 A033491
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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