1,2

Alois P. Heinz, Table of n, a(n) for n = 1..20000 (first 1249 terms from N. J. A. Sloane)

Rémy Sigrist, Colored scatterplot of (x,y) such that A275609(x,y) = 1 and -500 <= x <= 500 and -500 <= y <= 500 (where the color is function of (x mod 2) + 2 * (y mod 2))

Cf. A275609, A307188, A307190, A307191, A307192.

Sequence in context: A331192 A255843 A098145 * A054167 A303198 A120211

Adjacent sequences: A307186 A307187 A307188 * A307190 A307191 A307192

nonn

N. J. A. Sloane, Mar 28 2019

approved