A261907 Numbers that are the sum of two nonzero palindromes but are not palindromes themselves.

10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 23, 24, 25, 26, 27, 28, 29, 30, 31, 34, 35, 36, 37, 38, 39, 40, 41, 42, 45, 46, 47, 48, 49, 50, 51, 52, 53, 56, 57, 58, 59, 60, 61, 62, 63, 64, 67, 68, 69, 70, 71, 72, 73, 74, 75, 78, 79, 80, 81, 82, 83, 84, 85, 86, 89, 90, 91, 92, 93, 94, 95, 96, 97, 100, 102, 103, 104, 105, 106, 107, 108, 109, 110, 112

Offset: 1

Author

N. J. A. Sloane, Sep 09 2015

Keywords

• nonn
• base

Links

• N. J. A. Sloane, Table of n, a(n) for n = 1..7814

Crossrefs

Equals A261906 \ A002113. Cf. A213879, A260255.

Programs

Maple

# bP has a list of all palindromes (from A002113):
a3:={}; M:=60; M2:=bP[M];
for i from 2 to M do
for j from i to M do
k:=bP[i]+bP[j];
if k <= M2 and digrev(k) <> k then a3:={op(a3),k}; fi;
od: od:
b3:=sort(convert(a3,list));