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A108759 Triangle read by rows: T(n,k)=binomial(3k,k)*binomial(n+k,3k)/(2k+1) (0<=k<=floor(n/2)). +0
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1, 1, 1, 1, 1, 4, 1, 10, 3, 1, 20, 21, 1, 35, 84, 12, 1, 56, 252, 120, 1, 84, 630, 660, 55, 1, 120, 1386, 2640, 715, 1, 165, 2772, 8580, 5005, 273, 1, 220, 5148, 24024, 25025, 4368, 1, 286, 9009, 60060, 100100, 37128, 1428, 1, 364, 15015, 137280, 340340, 222768 (list; graph; listen)
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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.


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