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A092371
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Triangle read by rows: T(n,k)=C(n,k)*C(n+k,n-k).
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0
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1, 6, 1, 18, 15, 1, 40, 90, 28, 1, 75, 350, 280, 45, 1, 126, 1050, 1680, 675, 66, 1, 196, 2646, 7350, 5775, 1386, 91, 1, 288, 5880, 25872, 34650, 16016, 2548, 120, 1, 405, 11880, 77616, 162162, 126126, 38220, 4320, 153, 1, 550, 22275, 205920, 630630
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..49.
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FORMULA
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T(n,k)=[x^(n-k)]F(-n,-n-k;1;x); [From Paul Barry, Sep 04 2008]
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PROG
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(PARI) T(n, k)=binomial(n, k)*binomial(n+k, n-k)
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CROSSREFS
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First column = A002411, second column = A001297, main diagonal = 1, second diagonal = A000384.
Cf. A063007.
Sequence in context: A125233 A139727 A049325 * A187552 A157386 A157396
Adjacent sequences: A092368 A092369 A092370 * A092372 A092373 A092374
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KEYWORD
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nonn,tabl
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AUTHOR
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Benoit Cloitre, Mar 20 2004
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STATUS
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approved
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