id:A031440 - OEIS Search Results

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a(n) is the greatest prime factor of a(n-1)^2-2.

+0
2

3, 7, 47, 2207, 4481, 26111, 189017, 67271, 11815633, 606737, 708641, 354023, 125332284527, 51939720282500417, 18062107820423, 1376080289340623571113, 4012316132900773615751, 983669740542169, 4443427285129103, 19744046038229790810567377584607, 4300749014896245437702886338812998834884967953, 41572359968343362282287450730112204489086145685200294134959430572332688727999 (list; graph; listen)

	OFFSET	`0,1`
	LINKS	`Dennis Langdeau, Table of n, a(n) for n = 0..23`
	CROSSREFS	`Sequence in context: A005650 A020754 A052381 this_sequence A001566 A019039 A077559` `Adjacent sequences: A031437 A031438 A031439 this_sequence A031441 A031442 A031443`
	KEYWORD	`nonn,nice`
	AUTHOR	`Yasutoshi Kohmoto (zbi74583(AT)boat.zero.ad.jp)`
	EXTENSIONS	`More terms from Dennis Langdeau (dlangdea(AT)sfu.ca), Jun 26 2006`

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Last modified September 8 08:06 EDT 2008. Contains 143486 sequences.

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