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 A181722 Numerator of (1/n - Bernoulli number A164555(n)/A027642(n)). 1
 0, 0, 1, 1, 7, 1, 5, 1, 13, 1, 1, 1, 901, 1, -11, 1, 3647, 1, -43825, 1, 1222387, 1, -854507, 1, 1181821001, 1, -76977925, 1, 23749461059, 1, -8615841275543, 1, 28267510484519, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS An autosequence is a sequence whose inverse binomial transform is the sequence signed. In integers, the oldest example is Fibonacci A000045. In fractions, A164555/A027642 is the son of 1/n via the Akiyama-Tanigawa algorithm; grandson is (A174110/A174111) = 1/2,2/3,1/2,2/15,... ; see A164020. See A174341/A174342. All are from the same family. LINKS EXAMPLE Fractions are 0, 0, 1/6, 1/4, 7/30, 1/6, 5/42, 1/8, 13/90, 1/10, 1/66, 1/12, 901/2730, ... CROSSREFS Sequence in context: A117182 A143301 A225459 * A021587 A195496 A065479 Adjacent sequences:  A181719 A181720 A181721 * A181723 A181724 A181725 KEYWORD sign,frac AUTHOR Paul Curtz, Nov 17 2010 STATUS approved

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