id:A089196 - OEIS Search Results

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Floor(n / (smallest prime factor of n+1)).

+0
1

0, 0, 1, 0, 2, 0, 3, 2, 4, 0, 5, 0, 6, 4, 7, 0, 8, 0, 9, 6, 10, 0, 11, 4, 12, 8, 13, 0, 14, 0, 15, 10, 16, 6, 17, 0, 18, 12, 19, 0, 20, 0, 21, 14, 22, 0, 23, 6, 24, 16, 25, 0, 26, 10, 27, 18, 28, 0, 29, 0, 30, 20, 31, 12, 32, 0, 33, 22, 34, 0, 35, 0, 36, 24, 37, 10, 38, 0, 39, 26, 40 (list; graph; listen)

	OFFSET	`1,5`
	COMMENT	`a(n) = A032742(n+1)-1; n = a(n) + A032742(n+1) iff n is odd;` `a(n) = 0 iff n+1 is prime.`
	CROSSREFS	`Cf. A020639.` `Sequence in context: A077961 A077962 A078031 this_sequence A140944 A057860 A092915` `Adjacent sequences: A089193 A089194 A089195 this_sequence A089197 A089198 A089199`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Dec 08 2003`

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

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