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A307193 Fill the plane with the square spiral with cells numbered as in A275609; sequence gives the cells along the East spoke starting at the origin. 9
0, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 4, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 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, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

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 East of the X.

CROSSREFS

Cf. A275609.

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

Sequence in context: A334949 A334732 A266875 * A111742 A178220 A334464

Adjacent sequences:  A307190 A307191 A307192 * A307194 A307195 A307196

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 29 2019

EXTENSIONS

More terms from Alois P. Heinz, Mar 30 2019

STATUS

approved

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Last modified June 24 17:34 EDT 2021. Contains 345418 sequences. (Running on oeis4.)