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 A157807 Numerators of fractions arranged in Cantor's ordering (1/1, 2/1, 1/2, 1/3, 3/1, 4/1, 3/2, 2/3, 1/4, 1/5, 5/1, 6/1, 5/2, ...) with equivalent fractions removed. 4
 1, 2, 1, 1, 3, 4, 3, 2, 1, 1, 5, 6, 5, 4, 3, 2, 1, 1, 3, 5, 7, 8, 7, 5, 4, 2, 1, 1, 3, 7, 9, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 1, 5, 7, 11, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 1, 3, 5, 9, 11, 13, 14, 13, 11, 8, 7, 4, 2, 1, 1, 3, 5, 7, 9, 11, 13, 15, 16, 15, 14 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS PROG (Python) from fractions import gcd for s in range(2, 100, 2): ..for i in range(1, s): ....if gcd(i, s - i) != 1: continue ....print(i) ..for i in range(s, 0, -1): ....if gcd(i, s + 1 - i) != 1: continue ....print(i) # Hiroaki Yamanouchi, Oct 06 2014 CROSSREFS Cf. A157813, denominators of the same sequence of fractions. Cf. A038566. Sequence in context: A237498 A319516 A015138 * A100529 A262953 A226209 Adjacent sequences:  A157804 A157805 A157806 * A157808 A157809 A157810 KEYWORD nonn,frac AUTHOR Ron R. King, Mar 07 2009 EXTENSIONS A-number in cross-reference corrected by R. J. Mathar, Sep 23 2009 a(19)-a(20) corrected and a(58)-a(82) added by Hiroaki Yamanouchi, Oct 06 2014 STATUS approved

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Last modified May 25 11:17 EDT 2019. Contains 323539 sequences. (Running on oeis4.)