Triangle, read by rows, where diagonals are successive self-convolutions of A108447.

Terms

a(0) =1a(1) =1a(2) =0a(3) =1a(4) =1a(5) =0a(6) =1a(7) =2a(8) =4a(9) =0a(10) =1a(11) =3a(12) =9a(13) =20a(14) =0a(15) =1a(16) =4a(17) =15a(18) =48a(19) =113a(20) =0a(21) =1a(22) =5a(23) =22a(24) =85a(25) =282a(26) =688a(27) =0a(28) =1a(29) =6