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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: A046005 A045121 A207374 * A112135 A074237 A192180

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 August 24 18:12 EDT 2019. Contains 326295 sequences. (Running on oeis4.)