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 A133083 A000012 * A133080. 2
 1, 2, 1, 2, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row sums = A032766, congruent to {0,1} mod 3: (1, 3, 4, 6, 7, 9, 10,...) LINKS G. C. Greubel, Table of n, a(n) for the first 50 rows, flattened FORMULA A000012 * A133080 as infinite lower triangular matrices. EXAMPLE First few rows of the triangle are: 1; 2, 1; 2, 1, 1; 2, 1, 2, 1; 2, 1, 2, 1, 1; 2, 1, 2, 1, 2, 1; ... MATHEMATICA T[n_, k_] := If[k == n, 1, 1  + (1 - (-1)^k)/2 ]; Table[T[n, k], {n, 1, 10}, {k, 1, n}] (* G. C. Greubel, Oct 21 2017 *) PROG (PARI) for(n=1, 10, for(k=1, n, print1(if(k==n, 1, 1 + (1-(-1)^k)/2), ", "))) \\ G. C. Greubel, Oct 21 2017 CROSSREFS Cf. A133080, A000012, A032766. Sequence in context: A214848 A006338 A020903 * A083921 A119672 A271608 Adjacent sequences:  A133080 A133081 A133082 * A133084 A133085 A133086 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Sep 08 2007 STATUS approved

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Last modified May 7 23:48 EDT 2021. Contains 343652 sequences. (Running on oeis4.)