id:A069879 - OEIS Search Results

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Number of pairs {i,j} with i different from j; 1<=i<=n; 1<= j <=n such that i+j is a prime number.

+0
1

0, 2, 4, 8, 10, 14, 18, 22, 28, 36, 42, 50, 56, 62, 70, 80, 88, 96, 104, 112, 122, 134, 144, 156, 168, 180, 194, 208, 220, 234, 248, 262, 276, 292, 308, 326, 344, 362, 380, 400, 418, 438, 456, 474, 494, 514, 532, 550, 570, 590 (list; graph; listen)

	OFFSET	`1,2`
	CROSSREFS	`Partial sums of 2*A060715(n).` `Sequence in context: A125499 A034822 A050567 this_sequence A074330 A024895 A087915` `Adjacent sequences: A069876 A069877 A069878 this_sequence A069880 A069881 A069882`
	KEYWORD	`nonn`
	AUTHOR	`Santi Spadaro (spados(AT)katamail.com), May 04 2002`

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Last modified July 6 17:22 EDT 2008. Contains 140988 sequences.

AT&T Labs Research