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A113376
Column 1 of triangle
A113374
, also equals column 0 of
A113381
^4.
3
1, 8, 84, 1296, 27850, 784146, 27630378, 1177691946, 59169833470, 3434258845248, 226594550768662, 16775755397765720, 1378646430074005827, 124636321499378130839, 12300850874338422058685
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..14.
FORMULA
A113374
equals the matrix square of
A113370
, which has the property: column k of
A113370
^2 = column 0 of
A113381
^(3*k+1) for k>=0.
PROG
(PARI) a(n)=local(A, B); A=Mat(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^(3*j-2))[i-j+1, 1])); )); A=B); (A^2)[n+2, 2]
CROSSREFS
Cf.
A113374
,
A113375
(column 0),
A113377
(column 2).
Sequence in context:
A052659
A346684
A350264
*
A205311
A258338
A245197
Adjacent sequences:
A113373
A113374
A113375
*
A113377
A113378
A113379
KEYWORD
nonn
AUTHOR
Paul D. Hanna
, Nov 14 2005
STATUS
approved
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Last modified March 28 05:02 EDT 2024. Contains 371235 sequences. (Running on oeis4.)