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 = 4, read by rows.
A174389
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 = 4, read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-15a(5) =1a(6) =1a(7) =-63a(8) =-63a(9) =1a(10) =1a(11) =-255a(12) =16065a(13) =-255a(14) =1a(15) =1a(16) =-1023a(17) =260865a(18) =260865a(19) =-1023a(20) =1a(21) =1a(22) =-4095a(23) =4189185a(24) =-1068242175a(25) =4189185a(26) =-4095a(27) =1a(28) =1a(29) =-16383
External references
- oeis: A174389