Triangle T(n, k) = c(n, q)/c(k, q) if k <= floor(n/2), otherwise c(n, q)/c(n-k, q), where c(n, q) = Product_{j=1..n} (1 - q^j) and q = 2, read by rows.
A174387
Triangle T(n, k) = c(n, q)/c(k, q) if k <= floor(n/2), otherwise c(n, q)/c(n-k, q), where c(n, q) = Product_{j=1..n} (1 - q^j) and q = 2, read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-3a(5) =1a(6) =1a(7) =-7a(8) =-7a(9) =1a(10) =1a(11) =-15a(12) =105a(13) =-15a(14) =1a(15) =1a(16) =-31a(17) =465a(18) =465a(19) =-31a(20) =1a(21) =1a(22) =-63a(23) =1953a(24) =-29295a(25) =1953a(26) =-63a(27) =1a(28) =1a(29) =-127
External references
- oeis: A174387