Convolution triangle by rows, A004736 * (A153582 * 0^(n-k)).

Terms

a(0) =1a(1) =2a(2) =1a(3) =3a(4) =2a(5) =3a(6) =4a(7) =3a(8) =6a(9) =9a(10) =5a(11) =4a(12) =9a(13) =18a(14) =24a(15) =6a(16) =5a(17) =12a(18) =27a(19) =48a(20) =65a(21) =7a(22) =6a(23) =15a(24) =36a(25) =72a(26) =130a(27) =177a(28) =8a(29) =7