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Search: id:A113857
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| A113857 |
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A062190 formatted as a triangular array: triangle centered to right 4.column. |
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+0
1
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| 126, 2772, 48048, 772200, 12033450, 184940756, 2824549728, 43028530272
(list; graph; listen)
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OFFSET
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0,1
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FORMULA
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C(4+2*n,n)*C(9+2*n,4+n)
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EXAMPLE
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if n=0 then C(4+2*n,n)*C(9+2*n,4+n)=C(4,0)*C(9,4)=1*126=126
if n=7 then C(4+2*7,7)*C(9+2*7,4+7)=C(18,7)*C(23,11)=31824*1352078=43028530272
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CROSSREFS
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Sequence in context: A027814 A109146 A133499 this_sequence A008397 A086024 A036403
Adjacent sequences: A113854 A113855 A113856 this_sequence A113858 A113859 A113860
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KEYWORD
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easy,uned,obsc,nonn
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AUTHOR
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Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 02 2006
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