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A177391
Column 0 of triangle
A177390
.
4
1, 1, 10, 447, 50040, 10435970, 3470932404, 1677020809366, 1106343610197376, 953498812570622640, 1038635682902781680400, 1393647840093243232341272, 2256617352635816315546864448, 4335800009191929632579481763728
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OFFSET
0,3
COMMENTS
Triangle T=
A177390
obeys: g.f. of row n of T^(2n) = (2n^2 + y)^n for n>=0.
LINKS
Table of n, a(n) for n=0..13.
PROG
(PARI) {a(n, p=2)=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^(p*(#N)))[r, c], polcoeff((x+p*(#M)^2)^(#M), c-1)))); L=sum(i=1, #M, -(M^0-M)^i/i); M=sum(i=0, #M, (L/p/(#N))^i/i!); ); M[n+1, 1]}
CROSSREFS
Cf.
A177390
,
A177392
,
A177393
,
A177394
.
Sequence in context:
A001327
A288325
A222665
*
A304289
A217523
A232773
Adjacent sequences:
A177388
A177389
A177390
*
A177392
A177393
A177394
KEYWORD
nonn
AUTHOR
Paul D. Hanna
, May 25 2010
STATUS
approved
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Last modified August 14 18:14 EDT 2024. Contains 375166 sequences. (Running on oeis4.)