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A111052 Numbers n such that (3*n^2) + 4 is prime. 0
1, 3, 5, 7, 11, 19, 21, 25, 31, 33, 37, 39, 45, 49, 53, 73, 75, 77, 81, 89, 91, 93, 107, 115, 119, 129, 131, 135, 137, 145, 157, 185, 187, 193, 203, 205, 207, 213, 215, 221, 227, 229, 231, 249, 259, 261, 263, 271, 283, 291, 297, 299, 301, 317, 325, 327, 331 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..57.

EXAMPLE

If n=77 then (3*n^2) + 4 = 17791 (prime).

MATHEMATICA

Select[Range[340], PrimeQ[3*#^2 + 4] &] - Stefan Steinerberger, Feb 26 2006

CROSSREFS

Sequence in context: A119573 A001366 A093329 * A138536 A093929 A144427

Adjacent sequences:  A111049 A111050 A111051 * A111053 A111054 A111055

KEYWORD

nonn

AUTHOR

Parthasarathy Nambi, Oct 06 2005

EXTENSIONS

More terms from Stefan Steinerberger, Feb 26 2006

STATUS

approved

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Last modified June 18 18:23 EDT 2013. Contains 226355 sequences.