OFFSET
0,1
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..30287 (first 1408 terms from N. J. A. Sloane)
Alois P. Heinz, Positions of first 1409 1's in plane of A274640
Zak Seidov, Graph of first differences of A273059.
Zak Seidov, Spiral A274640 with ones shown.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 28 2016
STATUS
approved