Double q-form product triangle:q=3;c(n,q)=Product[(1 - q^i)*(1 - q^(i - 1)), {i, 2, n}];t(n,m,q)=c(n,q)/(c(m,q)*c(n-m,q)).
A173885
Double q-form product triangle:q=3;c(n,q)=Product[(1 - q^i)*(1 - q^(i - 1)), {i, 2, n}];t(n,m,q)=c(n,q)/(c(m,q)*c(n-m,q)).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =16a(5) =1a(6) =1a(7) =208a(8) =208a(9) =1a(10) =1a(11) =2080a(12) =27040a(13) =2080a(14) =1a(15) =1a(16) =19360a(17) =2516800a(18) =2516800a(19) =19360a(20) =1a(21) =1a(22) =176176a(23) =213172960a(24) =2131729600a(25) =213172960a(26) =176176a(27) =1a(28) =1a(29) =1591408
External references
- oeis: A173885