login
A261907
Numbers that are the sum of two nonzero palindromes but are not palindromes themselves.
8
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
1,1
LINKS
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));
CROSSREFS
Equals A261906 \ A002113. Cf. A213879, A260255.
Sequence in context: A043638 A280824 A329448 * A102357 A102850 A350445
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Sep 09 2015
STATUS
approved