id:A031405 - OEIS Search Results

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Numbers n such that continued fraction for sqrt(n) has even period and central term 2.

+0
1

6, 12, 14, 20, 21, 28, 30, 33, 42, 44, 45, 52, 55, 56, 60, 70, 72, 77, 90, 95, 110, 112, 117, 126, 132, 133, 138, 153, 154, 156, 161, 165, 180, 182, 184, 189, 190, 207, 209, 210, 221, 234, 240, 248, 253, 261, 272, 275, 276, 285, 286, 297, 299, 306 (list; graph; listen)

	OFFSET	`1,1`
	CROSSREFS	`Sequence in context: A136155 A136151 A056774 this_sequence A105773 A079946 A118586` `Adjacent sequences: A031402 A031403 A031404 this_sequence A031406 A031407 A031408`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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