Triangular array: the self-fusion of (p(n,x)), where p(n,x)=sum{((k+1)^2)*x^(n-k) : 0<=k<=n}.

Terms

a(0) =1a(1) =1a(2) =4a(3) =4a(4) =17a(5) =40a(6) =9a(7) =40a(8) =98a(9) =184a(10) =16a(11) =73a(12) =184a(13) =354a(14) =584a(15) =25a(16) =116a(17) =298a(18) =584a(19) =979a(20) =1484a(21) =36a(22) =169a(23) =440a(24) =874a(25) =1484a(26) =2275a(27) =3248a(28) =49a(29) =232