id:A094896 - OEIS Search Results

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a(n) = if 4*n+1 is prime and 4*n+3 is not prime then 4*n+1

+0
2

0, 0, 0, 13, 0, 0, 0, 0, 0, 37, 0, 0, 0, 53, 0, 61, 0, 0, 73, 0, 0, 0, 89, 0, 97, 0, 0, 109, 113, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 157, 0, 0, 0, 173, 0, 181, 0, 0, 193, 0, 0, 0, 0, 0, 0, 0, 0, 229, 233, 0, 241, 0, 0, 0, 257, 0, 0, 0, 0, 277, 0, 0, 0, 293, 0, 0, 0, 0, 313, 317, 0, 0, 0, 0, 337, 0, 0 (list; graph; listen)

	OFFSET	`0,4`
	MATHEMATICA	`a=Table[If[PrimeQ[4n+1]==True&&PrimeQ[4n+3]==False, 4*n+1, 0], {n, 0, 200}]`
	CROSSREFS	`Sequence in context: A165970 A081357 A127708 this_sequence A067155 A073867 A114782` `Adjacent sequences: A094893 A094894 A094895 this_sequence A094897 A094898 A094899`
	KEYWORD	`nonn`
	AUTHOR	`Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Jun 14 2004`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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