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 A176144 a(2n) = A164555(n). a(2n+1) = A027641(n). 3
 1, 1, 1, -1, 1, 1, 0, 0, -1, -1, 0, 0, 1, 1, 0, 0, -1, -1, 0, 0, 5, 5, 0, 0, -691, -691, 0, 0, 7, 7, 0, 0, -3617, -3617, 0, 0, 43867, 43867, 0, 0, -174611, -174611, 0, 0, 854513, 854513, 0, 0, -236364091, -236364091, 0, 0, 8553103, 8553103, 0, 0, -23749461029, -23749461029, 0, 0, 8615841276005 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,21 COMMENTS Formally, these are the numerators of a sequence of fractions defined by alternating A164555(n)/A027642(n) with A027641(n)/A027642(n), which apart from the third term duplicates the Bernoulli numbers. Essentially a duplication of the entries of A027641. LINKS Table of n, a(n) for n=0..60. CROSSREFS Cf. A141056, A164020, A141056. Sequence in context: A286979 A030047 A176184 * A308356 A065936 A299625 Adjacent sequences: A176141 A176142 A176143 * A176145 A176146 A176147 KEYWORD sign,frac,less AUTHOR Paul Curtz, Apr 10 2010 EXTENSIONS Edited by R. J. Mathar, Jun 07 2010 STATUS approved

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Last modified September 17 23:36 EDT 2024. Contains 375991 sequences. (Running on oeis4.)