A056130 Palindromic primes in bases 2 and 4.

3, 5, 17, 257, 5189, 65537, 83269, 86293, 1053953, 1066049, 1134929, 1311749, 1380629, 16864513, 17060929, 17909009, 18153809, 18171217, 21251141, 22103317, 289423441, 290455889, 290735441, 336662789, 336925957, 340873541

Offset

1,1

Comments

Intersection of A016041 and A029972.

Subsequence of primes of A097856. - Michel Marcus, Nov 07 2015

Links

Chai Wah Wu, Table of n, a(n) for n = 1..1000

Example

5 is 101 (base 2) and 11 (base 4), that are both palindromic.

Mathematica

Do[If[PrimeQ[n], t = RealDigits[n, 4][[1]]; If[FromDigits[t] == FromDigits[Reverse[t]], s = RealDigits[n, 2][[1]]; If[FromDigits[s] == FromDigits[Reverse[s]], Print[n]]]], {n, 1, 10^8, 2}]

Crossrefs

Cf. A016041 and A029972.

Sequence in context: A176689 A256510 A260377 * A273871 A078726 A019434

Adjacent sequences: A056127 A056128 A056129 * A056131 A056132 A056133

Keyword

nonn,base

Author

Robert G. Wilson v, Jul 29 2000

Status

approved