id:A076471 - OEIS Search Results

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Number of pairs (p,q) of successive primes with p+q<=n.

+0
3

0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13 (list; graph; listen)

	OFFSET	`1,8`
	COMMENT	`A056172(n)-1 <= a(n) <= A056172(n);` `a(n) = A076472(n) + A076473(n).`
	EXAMPLE	`Pairs (p,q) of successive primes with p+q<=27: {(2,3), (3,5), (5,7), (7,11), (11,13)}, hence a(27)=5.`
	CROSSREFS	`Cf. A000720.` `Adjacent sequences: A076468 A076469 A076470 this_sequence A076472 A076473 A076474` `Sequence in context: A000194 A097429 A100617 this_sequence A111656 A025423 A087233`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Oct 14 2002`

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Last modified May 16 01:24 EDT 2008. Contains 139630 sequences.

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