id:A133328 - OEIS Search Results

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Values of n such that the sum of the 7-gonal number 2.5*n^2-1.5*n and the following 7-gonal number is a 7-gonal number.

+0
1

0, 170, 13622, 6672192, 534017484, 261563278454 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`The bisections modulo 2 satisfy the same recurrence relation : a(n+2)=39202*a(n+1)-a(n)+7840`
	CROSSREFS	`Sequence in context: A045089 A114078 A031704 this_sequence A098244 A114048 A015975` `Adjacent sequences: A133325 A133326 A133327 this_sequence A133329 A133330 A133331`
	KEYWORD	`nonn`
	AUTHOR	`R. Choulet (richardchoulet(AT)yahoo.fr), Oct 18 2007`

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Last modified December 4 20:00 EST 2008. Contains 151309 sequences.