Triangle T(n, k, q) = c(n-1, q)*c(n, q)/(c(k-1, q)^2*c(n-k, q)*c(n-k+1, q)*f(k, q)), where c(n, q) = Product_{j=1..n} f(j, q), f(n, q) = q*(f(n-1, q) + f(n-2, q)), f(0, q) = 0, f(1, q) = 1, and q = 2, read by rows.
A172375
Triangle T(n, k, q) = c(n-1, q)*c(n, q)/(c(k-1, q)^2*c(n-k, q)*c(n-k+1, q)*f(k, q)), where c(n, q) = Product_{j=1..n} f(j, q), f(n, q) = q*(f(n-1, q) + f(n-2, q)), f(0, q) = 0, f(1, q) = 1, and q = 2, read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =6a(5) =1a(6) =1a(7) =48a(8) =48a(9) =1a(10) =1a(11) =352a(12) =2816a(13) =352a(14) =1a(15) =1a(16) =2640a(17) =154880a(18) =154880a(19) =2640a(20) =1a(21) =1a(22) =19680a(23) =8659200a(24) =63500800a(25) =8659200a(26) =19680a(27) =1a(28) =1a(29) =146944
External references
- oeis: A172375