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 A159937 Triangle read by rows, A054525 * A127478, as infinite lower triangular matrices. 2
 1, 1, 1, 2, 0, 2, 2, 1, 0, 2, 4, 0, 0, 0, 4, 2, 2, 2, 0, 0, 2, 6, 0, 0, 0, 0, 0, 6, 4, 2, 0, 2, 0, 0, 0, 4, 6, 0, 4, 0, 0, 0, 0, 0, 6, 4, 4, 0, 0, 4, 0, 0, 0, 0, 4, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 4, 2, 4, 4, 0, 2, 0, 0, 0, 0, 0, 4 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Row sums = A029935: (1, 2, 4, 5, 8, 8,...). Right and left borders = A000010, phi(n). LINKS FORMULA A054525 * A127478 = Mobius transform of triangle A127478. EXAMPLE First few rows of the triangle = 1; 1, 1; 2, 0, 2; 2, 1, 0, 2; 4, 0, 0, 0, 4; 2, 2, 2, 0, 0, 2; 6, 0, 0, 0, 0, 0, 6; 4, 2, 0, 2, 0, 0, 0, 4; 6, 0, 4, 0, 0, 0, 0, 0, 6; 4, 4, 0, 0, 4, 0, 0, 0, 0, 4; 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10; 4, 2, 4, 4, 0, 2, 0, 0, 0, 0, 0, 4; 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12; 6, 6, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 6; 8, 0, 8, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8; ... CROSSREFS Cf. A127478, A029935 Sequence in context: A161553 A256232 A099751 * A058728 A143751 A158950 Adjacent sequences:  A159934 A159935 A159936 * A159938 A159939 A159940 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Apr 26 2009 STATUS approved

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Last modified October 15 22:21 EDT 2018. Contains 316252 sequences. (Running on oeis4.)