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A143908 Eigentriangle by rows, n terms of (3 * A026150) followed by A026150(n). 1

%I #2 Mar 30 2012 17:25:32

%S 1,3,1,3,3,4,3,3,12,10,3,3,12,30,28,3,3,12,30,84,76,3,3,12,30,84,228,

%T 208,3,3,12,30,84,228,624,568,3,3,12,30,84,228,624,1704,1552

%N Eigentriangle by rows, n terms of (3 * A026150) followed by A026150(n).

%C Right border = A026150: (1, 1, 4, 10, 28, 76, 208, 568,...).

%C Row sums = (1, 4, 10, 28, 76,...) = INVERT transform of (1, 3, 3, 3,...).

%C Sum of n-th row terms = rightmost term of next row.

%F Eigentriangle by rows, n terms of (3 * A026150) followed by A026150(n).

%e First few rows of the triangle =

%e 1;

%e 3, 1;

%e 3, 3, 4;

%e 3, 3, 12, 10;

%e 3, 3, 12, 30, 28;

%e 3, 3, 12, 30, 84, 76;

%e 3, 3, 12, 30, 84, 228, 208;

%e ...

%Y A026150

%K nonn,tabl

%O 0,2

%A _Gary W. Adamson_, Sep 06 2008

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Last modified September 1 20:38 EDT 2024. Contains 375594 sequences. (Running on oeis4.)