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 A135387 Triangle read by rows, with (2, 1, 0, 0, 0, ...) in every column. 3
 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 (list; table; graph; refs; listen; history; text; internal format)
 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 LINKS 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 Cf. A118800, A038207. Cf. A000129. - Gary W. Adamson, Dec 29 2008 Sequence in context: A140083 A277729 A057985 * A321104 A127442 A115628 Adjacent sequences:  A135384 A135385 A135386 * A135388 A135389 A135390 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Dec 09 2007 STATUS approved

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Last modified August 3 03:52 EDT 2021. Contains 346435 sequences. (Running on oeis4.)