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Search: id:A105252
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| 1, 60, 1155, 12320, 90090, 504504, 2312310, 9060480, 31286970, 97337240, 277411134, 733649280, 1818838840, 4261894560, 9502285320, 20271542016, 41572498275, 82281899700, 157706974425, 293570877600, 532097215650
(list; graph; listen)
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OFFSET
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0,2
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EXAMPLE
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a(0) : if n=0 then C(0+5,0)*C(0+9,0)=C(5,0)*C(9,0)=1*1=1
a(10) : if n=10 then C(10+5,10)*C(10+9,10)=C(15,10)*(19,10)=3003*92378=277411134
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MATHEMATICA
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f[n_] := Binomial[n + 5, n]Binomial[n + 9, n]; Table[ f[n], {n, 0, 20}] (from Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 20 2005)
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CROSSREFS
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Sequence in context: A056312 A056352 A056346 this_sequence A146347 A054331 A160349
Adjacent sequences: A105249 A105250 A105251 this_sequence A105253 A105254 A105255
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KEYWORD
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easy,nonn
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AUTHOR
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Zerinvary Lajos (zlaja(AT)freemail.hu), Apr 14 2005
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 20 2005
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