A117702 Palindromic primes in base 7 (written in base 7).

2, 3, 5, 131, 212, 313, 515, 535, 616, 10301, 10501, 11111, 12521, 13531, 14141, 15151, 15551, 16361, 20302, 21512, 22322, 22522, 23132, 24542, 25352

Offset

1,1

Links

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

Eric Weisstein: Palindromic Prime.

Mathematica

pal7Q[n_]:=Module[{idn7=IntegerDigits[n, 7]}, idn7==Reverse[idn7]]; FromDigits[ IntegerDigits[#, 7]]&/@Select[Prime[Range[1000]], pal7Q] (* Harvey P. Dale, Aug 21 2021 *)

Crossrefs

Cf. A029975.

Sequence in context: A321362 A230372 A234900 * A041343 A229349 A160600

Adjacent sequences: A117699 A117700 A117701 * A117703 A117704 A117705

Keyword

nonn,base

Author

Martin Renner, Apr 13 2006

Status

approved