id:A031399 - OEIS Search Results

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Numbers n with no 4k+3 factors such that Pell equation x^2 - n y^2 = -1 insoluble.

+0
1

4, 8, 16, 20, 25, 32, 34, 40, 52, 64, 68, 80, 100, 104, 116, 128, 136, 146, 148, 160, 164, 169, 178, 194, 200, 205, 208, 212, 221, 232, 244, 256, 260, 272, 289, 292, 296, 305, 320, 328, 340, 356, 377, 386, 388, 400, 404, 410, 416, 424, 436, 452 (list; graph; listen)

	OFFSET	`1,1`
	REFERENCES	`"Advanced Number Theory" by Harvey Cohn.`
	LINKS	`Joerg Arndt, Fxtbook`
	CROSSREFS	`Cf. A031396, A031397, A031398.` `Sequence in context: A033310 A104235 A143718 this_sequence A076488 A092259 A036693` `Adjacent sequences: A031396 A031397 A031398 this_sequence A031400 A031401 A031402`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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