login
a(n) is the least positive integer that can be expressed as the sum of two distinct nonzero decimal palindromes in exactly n ways.
0

%I #25 Aug 31 2023 12:01:58

%S 1,3,5,7,9,110,353,363,373,383,393,524,474,484,565,494,575,615,585,

%T 837,595,716,686,1342,777,696,1332,787,878,918,797,888,979,32212,

%U 12892,898,989,1009,11220,54544,999,30902,11110,43423,42623,28982,1100,11000,35753,36663

%N a(n) is the least positive integer that can be expressed as the sum of two distinct nonzero decimal palindromes in exactly n ways.

%e For n = 5: 110 = 9 + 101 = 11 + 99 = 22 + 88 = 33 + 77 = 44 + 66.

%Y Cf. A002113, A115336, A341155.

%K nonn,base

%O 0,2

%A _Ilya Gutkovskiy_, Aug 28 2023

%E a(33) and beyond from _Michael S. Branicky_, Aug 31 2023