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A192261 Numbers n such that 4n+1 is a palindromic prime. 2
1, 25, 45, 78, 88, 93, 189, 199, 232, 2575, 2625, 2650, 3105, 3180, 3205, 3585, 3685, 4015, 4090, 4140, 4165, 4545, 4620, 7753, 7878, 8383, 8763, 8788, 8838, 8938, 9318, 9393, 9823 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..10000

Wikipedia, Pythagorean primes

FORMULA

{n such that A016813(n) is in A002385}. [Jonathan Vos Post, Jul 17 2011]

MATHEMATICA

Do[ If[PrimeQ[4*n + 1] , If[palQ[4*n + 1, 10], Print[n]]], {n, 10000}]

PROG

(PARI) is(n)=n==eval(concat(Vecrev(Str(n))))&&isprime(n);

for(n=1, 1e4, if(is(4*n+1), print1(n, ", "))) \\ Altug Alkan, Nov 04 2015

CROSSREFS

Cf. A002385, A002144, A081220.

Sequence in context: A015911 A188005 A054520 * A038811 A028505 A154082

Adjacent sequences:  A192258 A192259 A192260 * A192262 A192263 A192264

KEYWORD

nonn,base

AUTHOR

Matevz Markovic, Jul 02 2011

STATUS

approved

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Last modified June 22 12:24 EDT 2017. Contains 288613 sequences.