Let df(n,k) = Product_{i=0..k-1} (n-i) be the descending factorial and let P(m,n) = df(n-1,m-1)^2*(2*n-m)/((m-1)!*m!). Sequence gives P(6,n).

A132464

Let df(n,k) = Product_{i=0..k-1} (n-i) be the descending factorial and let P(m,n) = df(n-1,m-1)^2*(2*n-m)/((m-1)!*m!). Sequence gives P(6,n).

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =48a(7) =735a(8) =6272a(9) =37044a(10) =169344a(11) =640332a(12) =2090880a(13) =6073353a(14) =16032016a(15) =39078039a(16) =89037312a(17) =191456720a(18) =391523328a(19) =766192176a(20) =1442244096a(21) =2622518073a(22) =4623197040a(23) =7925786407a(24) =13248326784a(25) =21641442900a(26) =34616067200a(27) =54311107500a(28) =83710972800

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