OFFSET
0,2
COMMENTS
Triangle T=A132870 obeys: the g.f. of row n of T^n = (y + n^2)^n for n>=0.
LINKS
Paul D. Hanna, Table of n, a(n) for n = 0..29
PROG
(PARI) {a(n)=local(M=Mat(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!); ); sum(k=0, n, M[n+1, k+1])}
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
Paul D. Hanna, Sep 29 2007
STATUS
approved