id:A031406 - OEIS Search Results

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Numbers n such that continued fraction for sqrt(n) has even period and central term 3.

+0
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11, 19, 23, 40, 87, 96, 152, 159, 216, 219, 235, 335, 336, 344, 392, 415, 455, 515, 535, 567, 592, 615, 688, 707, 747, 816, 848, 875, 888, 920, 927, 944, 976, 1072, 1080, 1099, 1111, 1143, 1183, 1199, 1200, 1211, 1243, 1320, 1328, 1359, 1360 (list; graph; listen)

	OFFSET	`1,1`
	CROSSREFS	`Adjacent sequences: A031403 A031404 A031405 this_sequence A031407 A031408 A031409` `Sequence in context: A136435 A121658 A129517 this_sequence A105908 A084654 A089172`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified October 10 20:39 EDT 2008. Contains 144831 sequences.

AT&T Labs Research