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A175233 Numbers n with property that n and 4*n^2 + 163 are terms in A057605. 1
2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 14, 16, 19, 24, 27, 28, 29, 33, 39, 45, 49, 58, 64, 69, 74, 80, 81, 82, 89, 97, 104, 110, 113, 114, 121, 127, 128, 132, 141, 150, 154, 160, 165, 169, 171, 180, 193, 197, 208, 212, 217, 220, 222, 227, 232, 233, 244, 253, 264, 269, 275 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Numbers n with property that both m=4*n^2 + 163 and p=4*m^2 + 163 are primes.

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

FORMULA

n = 2: m = 4*n^2 + 163 = 179 and p = 4*m^2 + 163 = 128327 are primes.

MATHEMATICA

mpQ[n_]:=Module[{m=4n^2+163}, And@@PrimeQ[{m, 4m^2+163}]]; Select[Range[300], mpQ] (* Harvey P. Dale, Jul 15 2013 *)

CROSSREFS

Intersection of A057604 and A057605.

Sequence in context: A267304 A002855 A303234 * A121229 A286291 A286926

Adjacent sequences:  A175230 A175231 A175232 * A175234 A175235 A175236

KEYWORD

nonn

AUTHOR

Zak Seidov, Mar 09 2010

EXTENSIONS

Edited by Zak Seidov Mar 17 2010.

STATUS

approved

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Last modified May 22 21:05 EDT 2019. Contains 323503 sequences. (Running on oeis4.)