login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A117775 Total number of palindromic primes in base 3 below 3^n. 0
1, 1, 3, 3, 6, 6, 18, 18, 26, 26, 73, 73, 179, 179 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Every palindrome with an even number of digits is divisible by 11 (in base 3) and therefore is composite (not prime). Hence there is no palindromic prime with an even number of digits.

LINKS

Table of n, a(n) for n=1..14.

Eric Weisstein: Palindromic Prime.

CROSSREFS

Cf. A029971, A117698.

Sequence in context: A200905 A280510 A292128 * A243307 A021301 A016652

Adjacent sequences:  A117772 A117773 A117774 * A117776 A117777 A117778

KEYWORD

nonn,base

AUTHOR

Martin Renner, Apr 15 2006

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 13 00:25 EST 2019. Contains 329083 sequences. (Running on oeis4.)