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 A131307 (A127701 * A000012 + A000012(signed) * A127701) - A000012. 0
 1, 2, 3, 3, 2, 5, 4, 5, 2, 7, 5, 4, 7, 2, 9, 6, 7, 4, 9, 2, 11, 7, 6, 9, 4, 11, 2, 13, 8, 9, 6, 11, 4, 13, 2, 15, 9, 8, 11, 6, 13, 4, 15, 2, 17, 10, 11, 8, 13, 6, 15, 4, 17, 2, 19 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row sums = A035608: (1, 5, 10, 18, 27, 39, 52,...). LINKS FORMULA (A127701 * A000012 + A000012(signed) * A127701) - A000012; as infinite lower triangular matrices; where A000012(signed) = (1; -1,1; 1,-1,1; -1,1,-1,1;...). EXAMPLE First few rows of the triangle are: 1; 2, 3; 3, 2, 5; 4, 5, 2, 7; 5, 4, 7, 2, 9; 6, 7, 4, 9, 2, 11; 7, 6, 9, 4, 11, 2, 13; 8, 9, 6, 11, 4, 13, 2, 15; 9, 8, 11, 6, 13, 4, 15, 2, 17; 10, 11, 8, 13, 6, 15, 4, 17, 2, 19; ... CROSSREFS Cf.1 A000012, A127701, A035608. Sequence in context: A323833 A131899 A095174 * A336168 A091813 A238114 Adjacent sequences:  A131304 A131305 A131306 * A131308 A131309 A131310 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Sep 30 2007 STATUS approved

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Last modified August 8 19:29 EDT 2020. Contains 336298 sequences. (Running on oeis4.)