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A029732 Palindromic primes in base 16 (or hexadecimal), but written here in base 10. 7
2, 3, 5, 7, 11, 13, 17, 257, 337, 353, 401, 433, 449, 787, 883, 947, 1301, 1381, 1429, 1493, 1831, 1847, 1879, 2039, 2377, 2393, 2441, 2473, 2521, 2843, 2939, 2971, 3019, 3067, 3373, 3389, 3469, 3517, 3533, 3581, 3919, 3967, 4079, 65537 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Attila Olah, Table of n, a(n) for n=1..10000 (written in hexadecimal)
MATHEMATICA
lst={}; Do[p=Prime[n]; If[IntegerDigits[p, 16]==Reverse[IntegerDigits[p, 16]], AppendTo[lst, p]], {n, 7!}]; lst (* Vladimir Joseph Stephan Orlovsky, Jul 31 2009 *)
PROG
(Python)
from itertools import chain
from sympy import isprime
from gmpy2 import digits
A029732 = sorted((n for n in chain((int(digits(x, 16)+digits(x, 16)[::-1], 16) for x in range(1, 16**5)), (int(digits(x, 16)+digits(x, 16)[-2::-1], 16) for x in range(1, 16**5))) if isprime(n)))
# Chai Wah Wu, Aug 16 2014
(PARI) forprime(p=2, 10^4, my(d=digits(p, 16)); if(d==Vecrev(d), print1(p, ", "))); \\ Joerg Arndt, Aug 17 2014
CROSSREFS
Sequence in context: A061166 A003681 A217147 * A037950 A330224 A322527
KEYWORD
nonn,base
AUTHOR
STATUS
approved

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Last modified February 29 15:58 EST 2024. Contains 370425 sequences. (Running on oeis4.)