A062696 Palindromes that are the sum of two shorter palindromes.

11, 101, 121, 1001, 1111, 1221, 10001, 10101, 10201, 11011, 12221, 100001, 101101, 110011, 111111, 121121, 122221, 1000001, 1001001, 1002001, 1003001, 1004001, 1005001, 1006001, 1007001, 1008001, 1009001, 1010101, 1011101, 1012101

Offset

1,1

Comments

Because of the length constraints, all terms necessarily start (and hence end) with the digit 1. - Sean A. Irvine, Apr 04 2023

Links

Table of n, a(n) for n=1..30.

Example

121 = 22 + 99, all are palindromes and the first is longer than the other two.

Crossrefs

Cf. A002113.

Sequence in context: A176196 A303570 A208262 * A113654 A066592 A316604

Adjacent sequences: A062693 A062694 A062695 * A062697 A062698 A062699

Keyword

base,nonn

Author

Erich Friedman, Jul 04 2001

Extensions

a(18)-a(30) from Donovan Johnson, Sep 19 2009

Status

approved