A307195 Fill the plane with the square spiral with cells numbered as in A275609; sequence gives the cells along the North spoke starting at the origin.

0, 3, 0, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 3, 0, 3, 0, 3, 0, 3, 0, 3, 0, 3, 0, 3, 0, 3, 0, 3, 0, 3, 0, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 3, 1, 3, 1, 3, 1, 3

Offset

0,2

Comments

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.

Links

Alois P. Heinz, Table of n, a(n) for n = 0..1000

N. J. A. Sloane, Central portion of spiral, shown without spaces [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 of the X.

Crossrefs

Cf. A275609.

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

Sequence in context: A129555 A339558 A147755 * A231188 A249695 A136748

Adjacent sequences: A307192 A307193 A307194 * A307196 A307197 A307198

Keyword

nonn

Author

N. J. A. Sloane, Mar 29 2019

Extensions

More terms from Alois P. Heinz, Mar 30 2019

Status

approved