Triangular matrix, read by rows, equal to the matrix square of A102098.

Terms

a(0) =1a(1) =3a(2) =4a(3) =36a(4) =40a(5) =9a(6) =1036a(7) =1128a(8) =189a(9) =16a(10) =56355a(11) =61120a(12) =9720a(13) =576a(14) =25a(15) =5045370a(16) =5466320a(17) =857466a(18) =47040a(19) =1375a(20) =36a(21) =679409158a(22) =735847800a(23) =114915375a(24) =6155008a(25) =163500a(26) =2808a(27) =49a(28) =129195427716a(29) =139910204080