Convolution triangle of A006190.

Terms

a(0) =1a(1) =3a(2) =1a(3) =10a(4) =6a(5) =1a(6) =33a(7) =29a(8) =9a(9) =1a(10) =109a(11) =126a(12) =57a(13) =12a(14) =1a(15) =360a(16) =516a(17) =306a(18) =94a(19) =15a(20) =1a(21) =1189a(22) =2034a(23) =1491a(24) =600a(25) =140a(26) =18a(27) =1a(28) =3927a(29) =7807