cp's OEIS Frontend

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

%I A303502 #24 Jan 16 2023 08:11:28
%S A303502 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,
%T A303502 27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,
%U A303502 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
%N A303502 Integers k such that the digits of k together with a single supplementary digit can be reordered to form a base-10 palindrome.
%H A303502 Jean-Marc Falcoz, <a href="/A303502/b303502.txt">Table of n, a(n) for n = 1..4816</a>
%e A303502 a(1) = 1 together with a single 1 forms 11;
%e A303502 a(2) = 2 together with a single 2 forms 22;
%e A303502 a(3) = 3 together with a single 3 forms 33;
%e A303502 ...
%e A303502 a(101) = 101 together with a single 0 forms 1001;
%e A303502 102 is not in the sequence as no palindrome can be formed from the set [0,1,2,d], d being any single digit;
%e A303502 a(354) = 1002 is in the sequence as 1002 together with a single 1 forms 10201;
%e A303502 etc.
%Y A303502 Cf. A002113 (palindromes in base 10), A303504 (complement to this sequence).
%K A303502 nonn,base
%O A303502 1,2
%A A303502 _Eric Angelini_ and _Jean-Marc Falcoz_, Apr 25 2018