OFFSET
1,1
COMMENTS
Let the triangle = M, then M^n * [1, 1, 0, 0, 0, ...] generates rows of triangle A118800. M^n * [1, 0, 0, 0, ...] generates rows of triangle A038207.
Eigensequence of the triangle = the Pell numbers, A000129: (1, 2, 5, 12, 29, ...). - Gary W. Adamson, Dec 29 2008
FORMULA
Triangle by columns (2, 1, 0, 0, 0, 0, 0, ...) in every column. By rows, (n-2) zeros followed by 1, 2.
EXAMPLE
First few rows of the triangle:
2;
1, 2
0, 1, 2;
0, 0, 1, 2;
0, 0, 0, 1, 2;
0, 0, 0, 0, 1, 2;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Dec 09 2007
STATUS
approved