OFFSET
1,1
COMMENTS
Not known to be infinite. This list is complete up to 3,500,000.
LINKS
Robert Israel, Table of n, a(n) for n = 1..262
Aayush Rajasekaran, Jeffrey Shallit, and Tim Smith, Sums of Palindromes: an Approach via Nested-Word Automata, preprint arXiv:1706.10206 [cs.FL], June 30 2017.
MAPLE
# with A a list of terms < 2^d of A057890
B:= Array(0..2^d-1, datatype=integer[4]):
for a in A do B[a]:= 1 od:
C:= SignalProcessing:-Convolution(B, B):
select(t -> C[t+1] < 0.5, [$0..2^d-1]); # Robert Israel, Dec 08 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
Jeffrey Shallit, Dec 07 2016
STATUS
approved