id:A132190 - OEIS Search Results

Search: id:A132190

Displaying 1-1 of 1 results found.

page 1

Numbers n such that 7*n^2 + 1 is prime.

+0
2

2, 4, 8, 10, 12, 14, 18, 20, 22, 26, 30, 34, 44, 46, 58, 66, 68, 70, 74, 76, 78, 84, 90, 96, 100, 106, 108, 110, 120, 128, 134, 140, 146, 152, 154, 156, 158, 162, 164, 168, 174, 184, 186, 188, 196, 200, 202, 210, 216, 228, 232, 238, 250, 252, 260, 262, 264, 268 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`If n=2 then 7n^2 + 1 = 29 (prime).` `If n=100 then 7n^2 + 1 = 70001 (prime).`
	MATHEMATICA	`Select[Range[300], PrimeQ[7*#^2 + 1] &] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Jan 02 2008`
	CROSSREFS	`Cf. A111051.` `Sequence in context: A029992 A133012 A039011 this_sequence A001770 A032494 A125953` `Adjacent sequences: A132187 A132188 A132189 this_sequence A132191 A132192 A132193`
	KEYWORD	`nonn,easy`
	AUTHOR	`Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Nov 05 2007`
	EXTENSIONS	`More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Jan 02 2008`

page 1

Search completed in 0.002 seconds

Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research