login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A100325 Antidiagonal sums of square array A100324, which lists the self-convolutions of SHIFT(A003169). 1
1, 2, 6, 25, 130, 774, 5009, 34231, 242988, 1773767, 13229272, 100362848, 772016385, 6007208105, 47198747457, 373929821070, 2983774582206, 23958802697161, 193448157014605, 1569625544848531, 12791865082236462 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..20.

FORMULA

G.f. A(x) = (1+G003169(x))/(1-x-x*G003169(x)), where G003169(x) is the g.f. of A003169.

PROG

(PARI) {a(n)=local(A=1+x+x*O(x^n)); if(n==0, 1, for(i=1, n, A=1+x*A/(2-A)^2); sum(k=0, n, polcoeff(A^(n-k+1), k)))}

CROSSREFS

Cf. A003169, A100324.

Sequence in context: A132290 A030933 A299044 * A020112 A317022 A143917

Adjacent sequences:  A100322 A100323 A100324 * A100326 A100327 A100328

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Nov 17 2004

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 29 05:30 EDT 2021. Contains 346340 sequences. (Running on oeis4.)