login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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 A341275 A338550

Adjacent sequences: A132624 A132625 A132626 * A132628 A132629 A132630

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Aug 25 2007

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 29 18:13 EST 2022. Contains 358431 sequences. (Running on oeis4.)