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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A132626 Column 0 of triangle A132625. 2
1, 1, 2, 14, 336, 25836, 6251504, 4838830976, 12344615283200, 106978340796778976, 3229124399759665954432, 346176173916459184212747520, 133788163509847808639178273046528 (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-2^(n-j)-j; A=Vec((Polrev(A)+x*O(x^p))/(1-x))); A[p+1]}

CROSSREFS

Cf. A132625, A132627.

Sequence in context: A165696 A180605 A094155 * A101524 A346210 A255493

Adjacent sequences: A132623 A132624 A132625 * A132627 A132628 A132629

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 February 3 23:01 EST 2023. Contains 360045 sequences. (Running on oeis4.)