id:A115527 - OEIS Search Results

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Numbers n such that the concatenation of n with 2*n gives a square.

+0
30

3, 8163265306122448979592, 18367346938775510204082, 32653061224489795918368, 504986744097967428355005681100871102133568993813912384800 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`3_6 = 6^2.`
	CROSSREFS	`Cf. A102567, A106497, A115528 - A115556.` `Sequence in context: A058471 A068740 A058473 this_sequence A050920 A001231 A141150` `Adjacent sequences: A115524 A115525 A115526 this_sequence A115528 A115529 A115530`
	KEYWORD	`nonn,base`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), Jan 25 2006`

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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