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 A158905 Triangle read by rows, A000012 * A158902 1
 1, 3, 1, 6, 1, 1, 11, 2, 1, 1, 16, 2, 1, 1, 1, 25, 3, 2, 1, 1, 1, 32, 3, 2, 1, 1, 1, 1, 44, 4, 2, 2, 1, 1, 1, 1, 55, 4, 3, 2, 1, 1, 1, 1, 1, 70, 5, 3, 2, 2, 1, 1, 1, 1, 1, 81, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 104, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row sums = A024916: (1, 4, 8, 15, 21, 33, 41,...). LINKS Table of n, a(n) for n=1..78. FORMULA Triangle read by rows, A000012 * A158902; where the A000012 multiplier takes jcolumn sums of triangle A158902 starting from the top. EXAMPLE First few rows of the triangle = 1; 3, 1; 6, 1, 1; 11, 2, 1, 1; 16, 2, 1, 1, 1; 25, 3, 2, 1, 1, 1; 32, 3, 2, 1, 1, 1, 1; 44, 4, 2, 2, 1, 1, 1, 1; 55, 4, 3, 2, 1, 1, 1, 1, 1; 70, 5, 3, 2, 2, 1, 1, 1, 1, 1; 81, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1; 104, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1; 117, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1; 138, 7, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1; ... CROSSREFS Cf. A158902, A024916 Sequence in context: A128489 A034839 A089732 * A098076 A171852 A010287 Adjacent sequences: A158902 A158903 A158904 * A158906 A158907 A158908 KEYWORD nonn,tabl AUTHOR Gary W. Adamson & Mats Granvik, Mar 29 2009 STATUS approved

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Last modified August 8 12:42 EDT 2024. Contains 375021 sequences. (Running on oeis4.)