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A307191 Positions of 3's in the square spiral in A275609. 3
3, 7, 10, 17, 19, 24, 29, 32, 34, 43, 45, 50, 52, 57, 65, 67, 69, 71, 78, 80, 87, 89, 94, 96, 99, 111, 113, 115, 122, 124, 126, 133, 135, 145, 148, 150, 152, 154, 164, 166, 168, 177, 179, 181, 188, 190, 193, 195, 209, 212, 214, 216, 226, 228, 230, 232, 241 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..20000 (first 1216 terms from N. J. A. Sloane)

Rémy Sigrist, Colored scatterplot of (x,y) such that A275609(x,y) = 3 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-A307192.

Sequence in context: A100056 A163714 A333910 * A234638 A128223 A217258

Adjacent sequences:  A307188 A307189 A307190 * A307192 A307193 A307194

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 28 2019

STATUS

approved

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Last modified May 18 16:07 EDT 2021. Contains 343995 sequences. (Running on oeis4.)