Triangle read by rows: T(n, k) = n^k * n! * [x^k][y^n]((sec(y) + tan(y)) * exp(x*y)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =4a(6) =2a(7) =9a(8) =27a(9) =27a(10) =5a(11) =32a(12) =96a(13) =256a(14) =256a(15) =16a(16) =125a(17) =500a(18) =1250a(19) =3125a(20) =3125a(21) =61a(22) =576a(23) =2700a(24) =8640a(25) =19440a(26) =46656a(27) =46656a(28) =272a(29) =2989