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A113372
Column 2 of triangle
A113370
, also equals column 0 of
A113370
^7.
3
1, 7, 91, 1722, 43764, 1415799, 56096733, 2644883675, 145131435225, 9107198292451, 644373208531066, 50814103000624929, 4423148359685316443, 421540670702940409866, 43680252604560889074884
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OFFSET
0,2
COMMENTS
Column k of
A113370
= column 0 of
A113370
^(3*k+1) for k>=0.
LINKS
Table of n, a(n) for n=0..14.
PROG
(PARI) a(n)=local(A, B); A=Mat(1); for(m=2, n+3, 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^(3*j-2))[i-j+1, 1])); )); A=B); A[n+3, 3]
CROSSREFS
Cf.
A113370
,
A113371
(column 1),
A113373
(column 3).
Sequence in context:
A234570
A133307
A151833
*
A131940
A008542
A121940
Adjacent sequences:
A113369
A113370
A113371
*
A113373
A113374
A113375
KEYWORD
nonn
AUTHOR
Paul D. Hanna
, Nov 13 2005
STATUS
approved
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Last modified August 18 05:18 EDT 2024. Contains 375255 sequences. (Running on oeis4.)