References to A107981

Triangle read by rows: T(n,k)=(k+1)(k+2)(n+2)(n+3)(6n^2-8nk+18n+3k^2 -11k+12)/144 for 0<=k<=n.
1, 6, 10, 20, 40, 50, 50, 110, 155, 175, 105, 245, 371, 455, 490, 196, 476, 756, 980

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