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Search: id:A113888
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| A113888 |
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C(2*n+1,n)*C(2*n+6,n+1). |
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+0
1
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| 6, 84, 1200, 17325, 252252, 3699696, 54609984, 810616950, 12092280200, 181176906768, 2725140250560, 41132585656890, 622787147955000, 9456196695480000, 143946539451475200, 2196309308974461450, 33581927605139911800, 514470608092210770000, 7895695609776494520000
(list; graph; listen)
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OFFSET
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0,1
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EXAMPLE
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If n=0 then C(1+2*0,0+0)*C(6+2*0,1+0)=C(1,0)*C(6,1)=1*6=6
If n=4 then C(1+2*4,0+4)*C(6+2*4,1+4)=C(9,4)*C(14,5)=126*2002=252252
If n=10 C(1+2*10,0+10)*C(6+2*10,1+10)=C(21,10)*C(26,11)=352716*7726160=2725140250560
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CROSSREFS
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Cf. A062190.
Sequence in context: A119576 A098982 A011945 this_sequence A128575 A014062 A123312
Adjacent sequences: A113885 A113886 A113887 this_sequence A113889 A113890 A113891
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KEYWORD
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easy,nonn
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AUTHOR
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Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jan 28 2006
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EXTENSIONS
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Edited by njas, Feb 03 2007
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