Triangle T(n, k, q) = ((1-q)/(1-q^k))*c(n-1, q)*c(n, q)/(c(k-1,q)^2*c(n-k,q)*c(n-k+1, q)), where c(n, q) = Product_{j=1..n} (1-q^j) and q = 3, read by rows.
A172300
Triangle T(n, k, q) = ((1-q)/(1-q^k))*c(n-1, q)*c(n, q)/(c(k-1,q)^2*c(n-k,q)*c(n-k+1, q)), where c(n, q) = Product_{j=1..n} (1-q^j) and q = 3, read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =13a(5) =1a(6) =1a(7) =130a(8) =130a(9) =1a(10) =1a(11) =1210a(12) =12100a(13) =1210a(14) =1a(15) =1a(16) =11011a(17) =1024870a(18) =1024870a(19) =11011a(20) =1a(21) =1a(22) =99463a(23) =84245161a(24) =784128037a(25) =84245161a(26) =99463a(27) =1a(28) =1a(29) =896260
External references
- oeis: A172300