Triangle read by rows: T(n,k) = binomial(n,k)*6^(n-k)*6^k, 0<=k<=n.

Terms

a(0) =1a(1) =6a(2) =6a(3) =36a(4) =72a(5) =36a(6) =216a(7) =648a(8) =648a(9) =216a(10) =1296a(11) =5184a(12) =7776a(13) =5184a(14) =1296a(15) =7776a(16) =38880a(17) =77760a(18) =77760a(19) =38880a(20) =7776a(21) =46656a(22) =279936a(23) =699840a(24) =933120a(25) =699840a(26) =279936a(27) =46656a(28) =279936a(29) =1959552