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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
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
Sequence in context: A339522 A045121 A207374 * A112135 A369342 A368873
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.)