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A135387
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Triangle read by rows, with (2, 1, 0, 0, 0, ...) in every column.
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3
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2, 1, 2, 0, 1, 2, 0, 0, 1, 2, 0, 0, 0, 1, 2, 0, 0, 0, 0, 1, 2, 0, 0, 0, 0, 0, 1, 2, 0, 0, 0, 0, 0, 0, 1, 2, 0, 0, 0, 0, 0, 0, 0, 1, 2
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OFFSET
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1,1
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COMMENTS
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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
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LINKS
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FORMULA
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Triangle by columns (2, 1, 0, 0, 0, 0, 0, ...) in every column. By rows, (n-2) zeros followed by 1, 2.
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EXAMPLE
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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;
...
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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