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 A129688 A129686 * A128174. 2
 1, 0, 1, 2, 0, 1, 0, 2, 0, 1, 2, 0, 2, 0, 1, 0, 2, 0, 2, 0, 1, 2, 0, 2, 0, 2, 0, 1, 0, 2, 0, 2, 0, 2, 0, 1, 2, 0, 2, 0, 2, 0, 2, 0, 1, 0, 2, 0, 2, 0, 2, 0, 2, 0, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Resulting triangle has (1, 0, 2, 0, 2, 0, 2,...) in every column. Row sums = A109613: (1, 1, 3, 3, 5, 5,...). LINKS FORMULA A129686 * A128174 as infinite lower triangular matrices. EXAMPLE First few rows of the triangle are: 1; 0, 1; 2, 0, 1; 0, 2, 0, 1; 2, 0, 2, 0, 1; ... MATHEMATICA T[n_, k_] := If[k == n, 1, If[EvenQ[n + k], 2, 0]]; Table[T[n, k], {n, 1, 10}, {k, 1, n}] // Flatten (* Jean-François Alcover, Jul 10 2019 *) CROSSREFS Cf. A129686, A128174, A109613. Sequence in context: A091603 A325036 A194942 * A309011 A086713 A275730 Adjacent sequences:  A129685 A129686 A129687 * A129689 A129690 A129691 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Apr 28 2007 STATUS approved

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Last modified January 23 17:33 EST 2022. Contains 350514 sequences. (Running on oeis4.)