0,2

Triangle T=A132870 obeys: the g.f. of row n of T^n = (y + n^2)^n for n>=0.

(PARI) {a(n)=local(M=Mat([1, 0; 1, 1]), N, L); for(i=1, n, N=M; M=matrix(#N+1, #N+1, r, c, if(r>=c, if(r<=#N, (N^(#N))[r, c], polcoeff((x+(#M)^2)^(#M), c-1)))); L=sum(i=1, #M, -(M^0-M)^i/i); M=sum(i=0, #M, (L/#N)^i/i!); ); M[n+2, 2]/(n+1)}

Cf. A132870, A132871, A132872, A132873.

Sequence in context: A015200 A030642 A068391 this_sequence A071102 A060381 A145328

Adjacent sequences: A132871 A132872 A132873 this_sequence A132875 A132876 A132877

nonn

Paul D. Hanna (pauldhanna(AT)juno.com), Sep 29 2007