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 + 6.

A257626

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 + 6.

Terms

    a(0) =1a(1) =6a(2) =6a(3) =36a(4) =108a(5) =36a(6) =216a(7) =1404a(8) =1404a(9) =216a(10) =1296a(11) =15876a(12) =33696a(13) =15876a(14) =1296a(15) =7776a(16) =166212a(17) =642492a(18) =642492a(19) =166212a(20) =7776a(21) =46656a(22) =1659204a(23) =10701720a(24) =19274760a(25) =10701720a(26) =1659204a(27) =46656a(28) =279936a(29) =16052580

External references