A057874 - OEIS

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A057874

Sets of three composites in bidirectional 'sum of prime factors' progression/retrogression.

95, 119, 143, 174191, 175031, 175871, 298687992, 298688708, 298689424 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	COMMENTS	`First term of next set > 2000000000.`
	LINKS	`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: A181767 A046005 A045121 * A112135 A074237 A192180` `Adjacent sequences: A057871 A057872 A057873 * A057875 A057876 A057877`
	KEYWORD	`nonn,hard`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Sep 15 2000.`
	EXTENSIONS	`This really seems to be three sequences, not one! Should be split. - N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 16 21:51 EST 2012. Contains 205978 sequences.