id:A139404 - OEIS Search Results

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Numbers n such that 24n+5 and 24n+7 are twin primes

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8

1, 4, 6, 8, 11, 19, 34, 44, 51, 53, 54, 78, 81, 83, 89, 93, 96, 99, 106, 116, 141, 144, 148, 149, 159, 163, 173, 176, 184, 188, 193, 209, 228, 229, 239, 258, 261, 279, 286, 306, 316, 323, 328, 331 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`1/3 of number k such that 8k+5 and 8k+7 are primes.` `All numbers in A125821 are divisable by 3`
	FORMULA	`a(n)=A125821(n)/3`
	MATHEMATICA	`a = {}; Do[If[PrimeQ[8 n + 5] && PrimeQ[8 n + 3] && PrimeQ[n], AppendTo[a, n]], {n, 1, 10000}]; a`
	CROSSREFS	`Cf. A125822, A139402, A139404.` `Sequence in context: A134779 A075325 A026278 this_sequence A014455 A110646 A031359` `Adjacent sequences: A139401 A139402 A139403 this_sequence A139405 A139406 A139407`
	KEYWORD	`nonn`
	AUTHOR	`Artur Jasinski (grafix(AT)csl.pl), Apr 19 2008`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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