A convolution triangle of numbers obtained from A036068.

Terms

a(0) =1a(1) =6a(2) =1a(3) =30a(4) =12a(5) =1a(6) =135a(7) =96a(8) =18a(9) =1a(10) =567a(11) =630a(12) =198a(13) =24a(14) =1a(15) =2268a(16) =3654a(17) =1701a(18) =336a(19) =30a(20) =1a(21) =8748a(22) =19440a(23) =12501a(24) =3564a(25) =510a(26) =36a(27) =1a(28) =32805a(29) =96957