A278862 Numbers that are not the sum of 2 or fewer terms from A057890.

157441, 177617, 178637, 226891, 374359, 900745, 1456223, 1526983, 1545227, 1817999, 2232815, 2274595, 2320643, 2336935, 2363383, 2404487, 2461559, 2536595, 2812451, 2877463, 2893769, 2910811, 2912446, 3046915, 3053999, 3090575, 3105319, 3382141

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

Cf. A057890.

Sequence in context: A274364 A258073 A245681 * A250595 A253311 A253659

Adjacent sequences: A278859 A278860 A278861 * A278863 A278864 A278865

Keyword

nonn

Author

Jeffrey Shallit, Dec 07 2016

Status

approved