id:A059989 - OEIS Search Results

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3*n+1 and 4*n+1 are both squares.

+0
3

0, 56, 10920, 2118480, 410974256, 79726887240, 15466605150360, 3000441672282656, 582070217817684960, 112918621814958599640, 21905630561884150645256, 4249579410383710266580080 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`Equals ((A001570(n))^2-1)/3`
	EXAMPLE	`356+1=13^2 and 456+1=15^2`
	CROSSREFS	`Sequence in context: A006690 A034204 A091546 this_sequence A059073 A158362 A115469` `Adjacent sequences: A059986 A059987 A059988 this_sequence A059990 A059991 A059992`
	KEYWORD	`easy,nonn`
	AUTHOR	`David Radcliffe (radcl008(AT)umn.edu), Mar 07 2001`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research