OFFSET
0,4
COMMENTS
It is conjectured that every nonnegative number appears on the x-axis exactly once.
a(n) is also the distance to the origin from the point n+1 on the x-axis in A274640.
LINKS
Rémy Sigrist, Table of n, a(n) for n = 0..4999
Rémy Sigrist, PARI program for A324480
EXAMPLE
The portion of the x-axis near 0 is:
... 14 6 5 4 2 0 1 3 7 10 11 ...
and we see that both 1 and 2 are at distance 1 from 0. So a(1) = a(2) = 1.
PROG
(PARI) See Links section.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Mar 11 2019
EXTENSIONS
More terms from Jinyuan Wang, Feb 27 2020
STATUS
approved