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A092370 Triangle read by rows: T(n,k)=(1/2)*C(n+k,k)*C(n-k,k). 0
1, 3, 3, 6, 15, 10, 10, 45, 70, 35, 15, 105, 280, 315, 126, 21, 210, 840, 1575, 1386, 462, 28, 378, 2100, 5775, 8316, 6006, 1716, 36, 630, 4620, 17325, 36036, 42042, 25740, 6435, 45, 990, 9240, 45045, 126126, 210210, 205920, 109395, 24310, 55, 1485, 17160 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..48.

PROG

(PARI) T(n, k)=(1/2)*binomial(n+k, k)*binomial(n, n-k)

CROSSREFS

First column = A000217, second column = A050534, main diagonal = A001700, second diagonal = A033876.

Cf. A063007.

Sequence in context: A110523 A145597 A143418 * A245796 A006807 A298180

Adjacent sequences:  A092367 A092368 A092369 * A092371 A092372 A092373

KEYWORD

nonn,tabl

AUTHOR

Benoit Cloitre, Mar 20 2004

STATUS

approved

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Last modified February 21 02:02 EST 2020. Contains 332086 sequences. (Running on oeis4.)