Triangle read by rows: T(n,k) = t(n-k, k); t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), where f(x) = 3*x + 4.

A257622

Triangle read by rows: T(n,k) = t(n-k, k); t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), where f(x) = 3*x + 4.

Terms

    a(0) =1a(1) =4a(2) =4a(3) =16a(4) =56a(5) =16a(6) =64a(7) =552a(8) =552a(9) =64a(10) =256a(11) =4696a(12) =11040a(13) =4696a(14) =256a(15) =1024a(16) =36968a(17) =171448a(18) =171448a(19) =36968a(20) =1024a(21) =4096a(22) =278232a(23) =2305968a(24) =4457648a(25) =2305968a(26) =278232a(27) =4096a(28) =16384a(29) =2037736

External references