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 A127506 Triangle read by rows: T(n,k) = A054521(n,k)*A000010(k), 1<=k<=n . 0
 1, 1, 0, 1, 1, 0, 1, 0, 2, 0, 1, 1, 2, 2, 0, 1, 0, 0, 0, 4, 0, 1, 1, 2, 2, 4, 2, 0, 1, 0, 2, 0, 4, 0, 6, 0, 1, 1, 0, 2, 4, 0, 6, 4, 0, 1, 0, 2, 0, 0, 0, 6, 0, 6, 0 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,9 COMMENTS Row sums = A053570. LINKS FORMULA A054521 * M, as infinite lower triangular matrices; M = phi(n) in the main diagonal and the rest zeros. EXAMPLE First few rows of the triangle are: 1; 1, 0; 1, 1, 0; 1, 0, 2, 0; 1, 1, 2, 2, 0; 1, 0, 0, 0, 4, 0; 1, 1, 2, 2, 4, 2, 0; ... CROSSREFS Cf. A054521, A000010, A053570. Sequence in context: A259920 A048881 A026931 * A007968 A236532 A077763 Adjacent sequences:  A127503 A127504 A127505 * A127507 A127508 A127509 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Jan 17 2007 EXTENSIONS Edited by R. J. Mathar, Jan 09 2008 STATUS approved

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Last modified October 18 18:58 EDT 2018. Contains 316323 sequences. (Running on oeis4.)