id:A163127 - OEIS Search Results

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a(1)=1. a(n) = the number of integers k, 1 <= k <= n-1, where GCD(a(k),n-k) >= 2.

+0
2

1, 0, 0, 1, 2, 2, 3, 3, 3, 4, 4, 5, 5, 5, 5, 5, 6, 6, 7, 8, 8, 8, 8, 9, 9, 11, 11, 10, 9, 11, 10, 12, 14, 12, 13, 14, 14, 16, 14, 17, 16, 15, 18, 17, 18, 18, 20, 20, 21, 18, 20, 23, 23, 22, 22, 23, 24, 22, 24, 25, 28, 24, 29, 23, 28, 27, 28, 26, 29, 26, 30, 30, 31, 32, 33, 31, 32, 31 (list; graph; listen)

	OFFSET	`1,5`
	COMMENT	`For the purpose of this sequence GCD(m,0) is considered to be m.`
	CROSSREFS	`Cf. A163126` `Sequence in context: A057364 A060144 A107347 this_sequence A077113 A143796 A057362` `Adjacent sequences: A163124 A163125 A163126 this_sequence A163128 A163129 A163130`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet (q1qq2qqq3qqqq(AT)yahoo.com), Jul 21 2009`
	EXTENSIONS	`More terms from Sean A. Irvine (sairvin(AT)xtra.co.nz), Oct 20 2009`

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Last modified March 19 01:26 EDT 2010. Contains 173632 sequences.

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