Triangle T(n, k) = c(n)/(c(k)*c(n-k)) where c(n) = (n-2)!*(n-1)!*n!*(n+1)!*(n+3)!/1440 with c(0) = c(1) = 1 and c(2) = 2, read by rows.

A173890

Triangle T(n, k) = c(n)/(c(k)*c(n-k)) where c(n) = (n-2)!*(n-1)!*n!*(n+1)!*(n+3)!/1440 with c(0) = c(1) = 1 and c(2) = 2, read by rows.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =72a(8) =72a(9) =1a(10) =1a(11) =840a(12) =30240a(13) =840a(14) =1a(15) =1a(16) =2880a(17) =1209600a(18) =1209600a(19) =2880a(20) =1a(21) =1a(22) =7560a(23) =10886400a(24) =127008000a(25) =10886400a(26) =7560a(27) =1a(28) =1a(29) =16800

External references