A113924 - OEIS

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A113924

a(n) = GCD(A113605(n+1),A113605(n)). Also, for n >= 2, a(n) = A113605(n+2) - A113605(n-1).

1, 1, 1, 2, 1, 3, 1, 1, 4, 1, 1, 5, 1, 2, 1, 1, 1, 1, 8, 1, 3, 1, 1, 2, 1, 1, 1, 11, 2, 1, 1, 1, 1, 2, 1, 1, 5, 1, 4, 1, 1, 1, 1, 2, 19, 1, 1, 1, 10, 1, 7, 3, 1, 2, 1, 1, 1, 1, 6, 1, 1, 1, 5, 6, 1, 1, 1, 1, 2, 1, 3, 7, 1, 4, 1, 1, 1, 5, 2, 1 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,4`
	MAPLE	`A113605 := proc(n) option remember ; if n <=3 then 1 ; else A113605(n-3)+gcd(A113605(n-1), A113605(n-2)) ; fi ; end: A113924 := proc(n) gcd(A113605(n+1), A113605(n)) ; end; seq(A113924(n), n=1..80) ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 31 2008`
	CROSSREFS	`Cf. A113605.` `Sequence in context: A156826 A130296 A126705 * A178340 A173261 A084296` `Adjacent sequences: A113921 A113922 A113923 * A113925 A113926 A113927`
	KEYWORD	`more,nonn`
	AUTHOR	`Leroy Quet Jan 30 2006`
	EXTENSIONS	`More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 31 2008`

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Last modified February 15 14:37 EST 2012. Contains 205822 sequences.