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A160568 Diagonal sums of number triangle [k<=n]*C(n,2n-2k)3^(n-k)A000108(n-k). +0
2
1, 0, 1, 3, 1, 9, 19, 18, 91, 165, 271, 990, 1765, 3843, 11467, 21630, 53299, 140724, 287119, 736101, 1818235, 3982044, 10225117, 24521409, 56584243, 143641017, 341948179, 816095982, 2045559205, 4888806237, 11897144767, 29540684052 (list; graph; listen)
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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.


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