Triangle T(n, k, m) = t(n,m)/( t(k,m) * t(n-k,m) ) with T(n, 0, m) = T(n, n, m) = 1, where t(n, m) = Product_{j=1..n} Product_{i=1..j-1} ( 1 - (m+1)*(2*i-1) ) and m = 3, read by rows.

A156698

Triangle T(n, k, m) = t(n,m)/( t(k,m) * t(n-k,m) ) with T(n, 0, m) = T(n, n, m) = 1, where t(n, m) = Product_{j=1..n} Product_{i=1..j-1} ( 1 - (m+1)*(2*i-1) ) and m = 3, read by rows.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-3a(5) =1a(6) =1a(7) =33a(8) =33a(9) =1a(10) =1a(11) =-627a(12) =6897a(13) =-627a(14) =1a(15) =1a(16) =16929a(17) =3538161a(18) =3538161a(19) =16929a(20) =1a(21) =1a(22) =-592515a(23) =3343562145a(24) =-63527680755a(25) =3343562145a(26) =-592515a(27) =1a(28) =1a(29) =25478145

External references