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)*(3*i-2) ) and m = 2, read by rows.

A156725

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)*(3*i-2) ) and m = 2, read by rows.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-2a(5) =1a(6) =1a(7) =22a(8) =22a(9) =1a(10) =1a(11) =-440a(12) =4840a(13) =-440a(14) =1a(15) =1a(16) =12760a(17) =2807200a(18) =2807200a(19) =12760a(20) =1a(21) =1a(22) =-484880a(23) =3093534400a(24) =-61870688000a(25) =3093534400a(26) =-484880a(27) =1a(28) =1a(29) =22789360

External references