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A113361 Column 1 of triangle A113360, which equals the matrix cube of triangle A113340. 4
1, 9, 81, 879, 11739, 190044, 3654814, 81947221, 2107962168, 61366149296, 1998607800064, 72112467306074, 2858551691428042, 123596917897265255, 5792708223233376744, 292682081981049699408, 15865848522184194142469 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..16.

PROG

(PARI) a(n)=local(A, B); A=matrix(1, 1); A[1, 1]=1; for(m=2, n+2, B=matrix(m, m); for(i=1, m, for(j=1, i, if(i<3 || j==i || j>m-1, B[i, j]=1, if(j==1, B[i, 1]=1, B[i, j]=(A^(2*j-1))[i-j+1, 1])); )); A=B); (A^3)[n+2, 2]

CROSSREFS

Cf. A113340, A113350, A113360 (A113340^3), A113341 (column 0), A113362 (column 2), A113363 (column 3), A113364 (column 4).

Sequence in context: A077486 A233021 A187122 * A180737 A068881 A104266

Adjacent sequences:  A113358 A113359 A113360 * A113362 A113363 A113364

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Nov 08 2005

STATUS

approved

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Last modified October 18 08:18 EDT 2021. Contains 348066 sequences. (Running on oeis4.)