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A132627 Column 1 of triangle A132625. 2
1, 1, 4, 60, 2960, 454072, 216266368, 328381917376, 1646431825247488, 28147649085162289088, 1682689316516069630268928, 358405429181246295625283815424, 275845379756819156941815068510302208 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Triangle T=A132625 is generated by matrix powers of itself such that row n+1 of T = row n of T^(2^n) with appended '1' for n>=0 with T(0,0)=1.

LINKS

Table of n, a(n) for n=0..12.

PROG

(PARI) {a(n)=local(A=vector(n+1), p); A[1]=1; for(j=1, n, p=2^(n+1)-2^(n-j+1)-j; A=Vec((Polrev(A)+x*O(x^p))/(1-x))); A[p+1]}

CROSSREFS

Cf. A132625, A132626.

Sequence in context: A181444 A177780 A012567 * A229771 A136385 A173607

Adjacent sequences:  A132624 A132625 A132626 * A132628 A132629 A132630

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Aug 25 2007

STATUS

approved

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Last modified October 22 14:44 EDT 2019. Contains 328318 sequences. (Running on oeis4.)