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A102920 Triangular matrix, read by rows, equal to the matrix square of A102098. 6
1, 3, 4, 36, 40, 9, 1036, 1128, 189, 16, 56355, 61120, 9720, 576, 25, 5045370, 5466320, 857466, 47040, 1375, 36, 679409158, 735847800, 114915375, 6155008, 163500, 2808, 49, 129195427716, 139910204080, 21813099606, 1158059520, 29767000, 458136 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Column 0 is A102921. Column 1 is A102922.

LINKS

Table of n, a(n) for n=0..33.

EXAMPLE

Rows begin:

[1],

[3,4],

[36,40,9],

[1036,1128,189,16],

[56355,61120,9720,576,25],

[5045370,5466320,857466,47040,1375,36],

[679409158,735847800,114915375,6155008,163500,2808,49],...

PROG

(PARI) {T(n, k)=local(A=matrix(1, 1), B); A[1, 1]=1; for (m=2, n+1, B=matrix(m, m); for (i=1, m, for (j=1, i, if(j==i, B[i, j]=j, B[i, j]=(A^3)[i-1, j]); )); A=B); return((A^2)[n+1, k+1])}

CROSSREFS

Cf. A102098, A102921, A102922, A102916.

Sequence in context: A251259 A042891 A032835 * A064335 A013330 A274663

Adjacent sequences:  A102917 A102918 A102919 * A102921 A102922 A102923

KEYWORD

nonn,tabl

AUTHOR

Paul D. Hanna, Jan 21 2005

STATUS

approved

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Last modified March 23 03:02 EDT 2019. Contains 321422 sequences. (Running on oeis4.)