id:A111040 - OEIS Search Results

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Numbers n such that (2*n^2) + 9 is prime.

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1, 2, 4, 5, 7, 8, 11, 13, 14, 16, 17, 20, 22, 25, 26, 31, 35, 38, 40, 41, 44, 46, 50, 52, 58, 59, 61, 68, 71, 73, 77, 79, 80, 82, 88, 92, 94, 95, 101, 103, 106, 107, 112, 115, 116, 125, 130, 137, 139, 140, 146, 154, 157, 158, 163, 167, 169, 170, 176, 178, 179, 193, 205 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`If n=26 then (2*n^2) + 9 = 1361 (prime).`
	MAPLE	`a:=proc(n) if isprime(2*n^2+9)=true then n else fi end: seq(a(n), n=0..280); (Deutsch)`
	CROSSREFS	`Sequence in context: A006693 A158850 A112886 this_sequence A147807 A022559 A049781` `Adjacent sequences: A111037 A111038 A111039 this_sequence A111041 A111042 A111043`
	KEYWORD	`nonn`
	AUTHOR	`Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Oct 05 2005`
	EXTENSIONS	`More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Oct 06 2005`

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.

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