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A167718 Squares that becomes a prime number when prefixed with a 3. 1
1, 49, 121, 169, 361, 529, 1849, 2401, 3721, 6241, 8281, 9409, 11881, 14161, 14641, 19321, 20449, 25921, 27889, 39601, 49729, 51529, 52441, 69169, 76729, 83521, 89401, 94249, 104329, 113569, 124609, 143641, 165649, 175561, 187489, 190969 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..10000

MATHEMATICA

Select[Range[1, 4000, 2]^2, PrimeQ[FromDigits[Join[{3}, IntegerDigits[#]]]] &] (* G. C. Greubel, Jun 21 2016 *)

CROSSREFS

Sequence in context: A084733 A227863 A115557 * A080665 A130007 A202331

Adjacent sequences:  A167715 A167716 A167717 * A167719 A167720 A167721

KEYWORD

base,nonn

AUTHOR

Claudio Meller, Nov 10 2009

STATUS

approved

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Last modified May 28 10:34 EDT 2017. Contains 287240 sequences.