A307189 Positions of 1's in the square spiral in A275609.

1, 4, 6, 12, 23, 25, 27, 33, 35, 38, 40, 42, 44, 54, 56, 58, 64, 77, 79, 81, 83, 85, 95, 97, 103, 105, 107, 109, 112, 114, 128, 130, 132, 134, 136, 142, 144, 146, 156, 163, 165, 167, 169, 171, 173, 175, 189, 191, 201, 203, 205, 207, 213, 215, 234, 236, 238

Offset

1,2

Links

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))

Crossrefs

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

Sequence in context: A331192 A255843 A098145 * A054167 A303198 A120211

Adjacent sequences: A307186 A307187 A307188 * A307190 A307191 A307192

Keyword

nonn

Author

N. J. A. Sloane, Mar 28 2019

Status

approved