A084093 Prime power decimal palindromes that are not prime.

1, 4, 8, 9, 121, 343, 1331, 10201, 14641, 94249, 1030301, 104060401, 900075181570009, 10022212521222001, 12124434743442121, 12323244744232321, 12341234943214321, 1022321210249420121232201, 1210024420147410244200121

Offset

1,2

Comments

A084092 without A002385.

a(n) = A072037(n-1) for n > 1. - Georg Fischer, Oct 19 2018

Links

Donovan Johnson, Table of n, a(n) for n = 1..27 (terms < 10^30)

Eric Weisstein's World of Mathematics, Palindromic Prime.

Eric Weisstein's World of Mathematics, Prime Power.

Example

a(9)=14641=11^4; a(10)=94249=307^2=A000040(63)^2;
a(11)=1030301=101^3=A000040(26)^3.

Crossrefs

Cf. A002385, A072037, A084092.

Sequence in context: A348429 A046450 A077271 * A072037 A076703 A360900

Adjacent sequences: A084090 A084091 A084092 * A084094 A084095 A084096

Keyword

nonn,base

Author

Reinhard Zumkeller, May 11 2003

Extensions

a(13)-a(17) from Donovan Johnson, Feb 22 2008

Missing term 104060401 added by Donovan Johnson, Jul 02 2011

Status

approved