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A307189 Positions of 1's in the square spiral in A275609. 2
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 15 08:04 EDT 2021. Contains 343909 sequences. (Running on oeis4.)