A303502 Integers k such that the digits of k together with a single supplementary digit can be reordered to form a base-10 palindrome.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75

Offset: 1

Author

Eric Angelini and Jean-Marc Falcoz, Apr 25 2018

Keywords

• nonn
• base

Examples

			a(1) = 1 together with a single 1 forms 11;
a(2) = 2 together with a single 2 forms 22;
a(3) = 3 together with a single 3 forms 33;
...
a(101) = 101 together with a single 0 forms 1001;
102 is not in the sequence as no palindrome can be formed from the set [0,1,2,d], d being any single digit;
a(354) = 1002 is in the sequence as 1002 together with a single 1 forms 10201;
etc.
		

Links

• Jean-Marc Falcoz, Table of n, a(n) for n = 1..4816

Crossrefs

Cf. A002113 (palindromes in base 10), A303504 (complement to this sequence).