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 A057874 Sets of three composites in bidirectional 'sum of prime factors' progression/retrogression. 0
 95, 119, 143, 174191, 175031, 175871, 298687992, 298688708, 298689424 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS First term of next set > 2000000000. LINKS Table of n, a(n) for n=0..8. Index entries for sequences related to primes in arithmetic progressions EXAMPLE First set is (95,119,143) all terms having 'sum of prime factors' = 24. So '95' + (5+19) = '119' + (7+17) = '143' AND '143' - (11+13) = '119' - (7+17) = '95'. CROSSREFS Cf. A050780, A050781, A050703-A050710. Sequence in context: A339522 A045121 A207374 * A112135 A369342 A368873 Adjacent sequences: A057871 A057872 A057873 * A057875 A057876 A057877 KEYWORD nonn,hard AUTHOR Patrick De Geest, Sep 15 2000 EXTENSIONS This really seems to be three sequences, not one! Should be split. - N. J. A. Sloane STATUS approved

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Last modified May 22 06:48 EDT 2024. Contains 372743 sequences. (Running on oeis4.)