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A317193
First differences of A317192.
2
1, -1, 1, 0, 1, -1, 1, 1, -1, 1, 0, 1, -1, 1, -1, 1, 0, 1, -1, 1, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 1, -1, 1, 0, 1, -1, 1, -1, 1, 0, 1, -1, 1, 1, -1, 1, 0, 1, -1, 1, 1, -1, 1, 0, 1, -1, 1, -1, 1, 0, 1, -1, 1, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 1, -1, 1, 0, 1, -1, 1, -1, 1, 0, 1, -1, 1, 1, -1, 1, 0, 1, -1, 1, -1
OFFSET
1
COMMENTS
It is known that the entries belong to the set {-1, 0, 1}.
Conjecture: This is an encoded version of the ternary tribonacci word
a,b,a,c,a,b,a,a,b,a,c,a,b,a,b,a,c,a,b,a,a,b,a,c,a,...
(see A080843) under the map a -> 1, b -> -1, c -> 0.
LINKS
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Jul 31 2018
STATUS
approved