A072592 - OEIS

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A072592

Even numbers with at least one prime factor of form 4*k+1.

10, 20, 26, 30, 34, 40, 50, 52, 58, 60, 68, 70, 74, 78, 80, 82, 90, 100, 102, 104, 106, 110, 116, 120, 122, 130, 136, 140, 146, 148, 150, 156, 160, 164, 170, 174, 178, 180, 182, 190, 194, 200, 202, 204, 208, 210, 212, 218, 220, 222, 226, 230, 232, 234, 238 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`A072591(a(n)) = 0.` `Conjecture: this is exactly the sequence whose terms are twice those of A009003. (This has been verified for all terms<=500.) Compare A009003. - John W. Layman (layman(AT)math.vt.edu), Mar 12 2008` `The conjecture is true. See comments on A008846 and A004613. - Lambert Herrgesell (zero815(AT)googlemail.com), Apr 24 2008`
	CROSSREFS	`Cf. A005843, A002144.` `Sequence in context: A034048 A199978 A179819 * A101869 A015872 A019491` `Adjacent sequences: A072589 A072590 A072591 * A072593 A072594 A072595`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 23 2002`

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Last modified February 16 07:39 EST 2012. Contains 205881 sequences.