Convolution triangle of A000958(n+1).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =2a(5) =1a(6) =8a(7) =7a(8) =3a(9) =1a(10) =24a(11) =22a(12) =12a(13) =4a(14) =1a(15) =75a(16) =73a(17) =43a(18) =18a(19) =5a(20) =1a(21) =243a(22) =246a(23) =156a(24) =72a(25) =25a(26) =6a(27) =1a(28) =808a(29) =844