A307194 - OEIS

%I #10 Mar 30 2019 18:04:54

%S 0,2,1,0,1,0,1,0,1,0,1,0,2,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,2,1,0,

%T 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,2,1,0,1,0,1,0,1,0,1,

%U 0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,2,1,0,1,0,1,0,1,0,1,0,1,0

%N Fill the plane with the square spiral with cells numbered as in A275609; sequence gives the cells along the North-East spoke starting at the origin.

%C The Example section of A275609 shows the central portion of the spiral very clearly. The link below shows a larger portion but is harder to read.

%H Alois P. Heinz, <a href="/A307194/b307194.txt">Table of n, a(n) for n = 0..1000</a>

%H N. J. A. Sloane, <a href="/A275609/a275609.txt">Central portion of spiral, shown without spaces</a> [The central 0 (at (0,0)) has been changed to an X. The illustration shows cells (x,y) with -35 <= x <= 35, -33 <= y <= 36.] The present sequence gives the numbers to the North-East of the X.

%Y Cf. A275609.

%Y The eight spokes starting at the origin are A307193 - A307200.

%K nonn

%O 0,2

%A _N. J. A. Sloane_, Mar 29 2019

%E More term from _Alois P. Heinz_, Mar 30 2019