id:A072901 - OEIS Search Results

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Composite numbers n such that the discriminant of the quadratic field Q(sqrt(n) equals 4n.

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6, 10, 14, 15, 22, 26, 30, 34, 35, 38, 39, 42, 46, 51, 55, 58, 62, 66, 70, 74, 78, 82, 86, 87, 91, 94, 95, 102, 106, 110, 111, 114, 115, 118, 119, 122, 123, 130, 134, 138, 142, 143, 146, 154, 155, 158, 159, 166, 170, 174, 178, 182, 183, 186, 187, 190, 194, 195 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Numbers n such that n=pp_1p_2,., p_n and p is not repeat. Example: 6=23; 15=35; 30=235; 154=2711; 195=3513 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Oct 03 2009]`
	CROSSREFS	`Cf. A037449.` `Sequence in context: A063078 A064452 A085647 this_sequence A162409 A075777 A167200` `Adjacent sequences: A072898 A072899 A072900 this_sequence A072902 A072903 A072904`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 10 2002`

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

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