id:A052454 - OEIS Search Results

Search: id:A052454

Displaying 1-1 of 1 results found.

page 1

Positive integer values of n such that 10n^2 - 9 is a square.

+0
2

1, 3, 13, 25, 111, 493, 949, 4215, 18721, 36037, 160059, 710905, 1368457, 6078027, 26995669 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`It appears that a(n)=38a(n-3)-a(n-6).`
	EXAMPLE	`25 is a term of the sequence since 10*25^2-9 = 6241 = 79^2.`
	CROSSREFS	`Cf. A082651, A077442.` `Sequence in context: A056714 A120074 A056706 this_sequence A066947 A031011 A099062` `Adjacent sequences: A052451 A052452 A052453 this_sequence A052455 A052456 A052457`
	KEYWORD	`nonn`
	AUTHOR	`John W. Layman (layman(AT)math.vt.edu), May 20 2003`

page 1

Search completed in 0.002 seconds

Last modified November 27 22:38 EST 2009. Contains 167602 sequences.