id:A013644 - OEIS Search Results

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Numbers n such that continued fraction for sqrt(n) has period 4.

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7, 14, 23, 28, 32, 33, 34, 47, 55, 60, 62, 75, 78, 79, 95, 96, 98, 119, 126, 128, 136, 138, 140, 141, 142, 155, 167, 174, 176, 180, 189, 192, 194, 215, 219, 220, 222, 223, 248, 252, 254, 266, 287, 299, 300, 305, 312, 315, 318, 320, 321, 322, 335, 359, 368, 377, 390, 392 (list; graph; listen)

	OFFSET	`1,1`
	REFERENCES	`Kenneth H. Rosen, Elementary Number Theory and Its Applications, Addison-Wesley, 1984, page 426 (but beware of errors!).`
	CROSSREFS	`Sequence in context: A018890 A118502 A036556 this_sequence A050953 A025011 A030414` `Adjacent sequences: A013641 A013642 A013643 this_sequence A013645 A013646 A013647`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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