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Search: id:A130563
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| A130563 |
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Fourth column (m=3) of the Laguerre-Sonin a=1/2 coefficient triangle. |
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+0
3
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| 1, 36, 990, 25740, 675675, 18378360, 523783260, 15713497800, 496939367925, 16564645597500, 581419060472250, 21459648959248500, 831561397170879375, 33774185977401870000, 1435402904039579475000, 63731888939357328690000
(list; graph; listen)
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OFFSET
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3,2
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FORMULA
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a(n)=n!*(2^(n-3))*binomial(n+1/2,n-3)/3!,n>=3.
a(n)=binomial(n,3)*(2*n+1)!!/7!!, with (2*n+1)!! = A001147(n+1).
a(n)=-A130757(n,3), n>=3.
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CROSSREFS
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Columns m=0, 1, 2 from A001147, A000457, A001881.
Contribution from Johannes W. Meijer (meijgia(AT)hotmail.com), Oct 16 2009: (Start)
Eighth right hand column of triangle A001498.
(End)
Sequence in context: A167250 A107398 A053111 this_sequence A025419 A000809 A151584
Adjacent sequences: A130560 A130561 A130562 this_sequence A130564 A130565 A130566
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KEYWORD
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nonn,easy
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AUTHOR
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Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de) Jul 13 2007
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