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 A144736 Triangle read by rows, A051731 * A000012 * A051731 * A054533 1
 1, 2, 1, 2, 0, 2, 3, 0, 2, 2, 2, -2, 1, 1, 4, 4, -2, 3, 0, 5, 2, 2, -4, 0, -1, 4, 1, 6, 4, -5, 2, -1, 4, 1, 6, 4, 3, -6, 1, -3, 4, -2, 6, 4, 6, 4, -8, 0, -4, 8, -3, 7, 3, 7, 4, 2, -8, -2, -6, 3, -4, 6, 2, 6, 3, 10 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row sums = sigma(n), A000203. Right border = phi(n), A000010 Left border = d(n), A000005 LINKS FORMULA Triangle read by rows, A051731 * A000012 * A051731 * A054533; as infinite lower triangular matrices. EXAMPLE First few rows of the triangle = 1; 2, 1; 2, 0, 2; 3, 0, 2, 2; 2, -2, 1, 1, 4; 4, -2, 3, 0, 5, 2; 2, -4, 0, -1, 4, 1, 6; 4, -5, 2, -1, 4, 1, 6, 4; 3, -6, 1, -3, 4, -2, 6, 4, 6; 4, -8, 0, -4, 8, -3, 7, 3, 7, 4; ... CROSSREFS A054533, Cf. A000203, A000005, A000010, A051731 Sequence in context: A093321 A302015 A046144 * A137423 A127471 A309044 Adjacent sequences:  A144733 A144734 A144735 * A144737 A144738 A144739 KEYWORD tabl,sign AUTHOR Gary W. Adamson, Sep 20 2008 STATUS approved

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Last modified July 19 03:54 EDT 2019. Contains 325144 sequences. (Running on oeis4.)