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 A159906 Triangle read by rows, A126988 * A054533 0
 1, 1, 1, 2, -1, 2, 2, 0, 0, 2, 4, -1, -1, -1, 4, 2, 0, 2, -1, 1, 2, 6, -1, -1, -1, -1, -1, 6, 40, 0, 0, 0, 0, 0, 0, 4, 6, -3, 3, 0, 0, -3, 0, 0, 6, 4, 2, -1, -3, 4, -1, 1, -1, 1, 4, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, 10 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Row sums = n, right and left borders = A000012, phi(n). LINKS FORMULA Triangle read by rows, A126988 * A054533, where A054533 = the lower half of the Ramanujan sum table. EXAMPLE First few rows of the triangle = 1; 1,...1; 2,..-1,...2; 2,...0,...0,...2; 4,..-1,..-1,..-1,...4; 2,...0,...2,..-1,...1,...2; 6,..-1,..-1,..-1,..-1,..-1,...6; 4,...0,...0,...0,...0,...0,...0,...4; 6,..-3,...3,...0,...0,..-3,...0,...0,...6; 4,...2,..-1,..-3,...4,..-1,...1,..-1,...1,...4; 10,.-1,..-1,..-1,..-1,..-1,..-1,..-1,..-1,..-1,...10; 4,..-4,...4,...2,...2,...0,...0,..-2,...0,...2,....0,...4; 12,.-1,..-1,..-1,..-1,..-1,..-1,..-1,..-1,..-1,...-1,..-1,...12; 6,...4,..-1,..-3,..-1,..-3,...6,..-1,...1,..-1,....1,...1,....1,...6; 8,..-7,...5,..-2,...8,..-2,...1,...1,..-2,..-4,....1,..-2,....1,...1,...8; 8,...0,...0,...0,...0,...0,...0,...0,...0,...0,....0,...0,....0,...0,...0,...8; ... CROSSREFS Cf. A126988, A054533 Sequence in context: A286129 A230322 A174950 * A263444 A276321 A152196 Adjacent sequences: A159903 A159904 A159905 * A159907 A159908 A159909 KEYWORD tabl,sign AUTHOR Gary W. Adamson, Apr 25 2009 STATUS approved

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Last modified December 5 13:26 EST 2022. Contains 358586 sequences. (Running on oeis4.)