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 A073189 Integers 0..k three times, then 0..k+1 three times, etc. 17
 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 6, 0, 1, 2, 3, 4, 5, 6, 0, 1, 2, 3, 4, 5, 6, 0, 1, 2, 3, 4, 5, 6, 7, 0, 1, 2, 3, 4, 5, 6, 7, 0, 1, 2, 3, 4 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,12 LINKS G. C. Greubel, Rows n=0..50 of triangle, flattened Michael Somos, Sequences used for indexing triangular or square arrays EXAMPLE 0; 0; 0; 0, 1; 0, 1; 0, 1; 0, 1, 2; 0, 1, 2; 0, 1, 2; 0, 1, 2, 3; 0, 1, 2, 3; ... MATHEMATICA Table[Range[0, k], {k, 0, 7}, {3}] // Flatten  (* Jean-François Alcover, Apr 18 2013 *) PROG (PARI) a(n)=local(m); m=floor(sqrt(6*n+6)-3/2)\3+1; (n-3*binomial(m, 2))%m CROSSREFS Sequence in context: A215592 A025684 A025678 * A194519 A025855 A215590 Adjacent sequences:  A073186 A073187 A073188 * A073190 A073191 A073192 KEYWORD nonn,tabf AUTHOR Michael Somos, Jul 19 2002 STATUS approved

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Last modified August 19 10:09 EDT 2022. Contains 356228 sequences. (Running on oeis4.)