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A307192 Positions of 4's in the square spiral in A275609. 6
13, 37, 62, 102, 140, 157, 200, 217, 250, 290, 330, 359, 392, 443, 452, 492, 525, 566, 629, 651, 686, 723, 768, 772, 847, 889, 912, 953, 1009, 1097, 1157, 1170, 1215, 1279, 1379, 1459, 1468, 1509, 1581, 1693, 1781, 1807, 1835, 1915, 1996, 2039, 2135 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..2886

Rémy Sigrist, Colored scatterplot of (x,y) such that A275609(x,y) = 4 and -500 <= x <= 500 and -500 <= y <= 500 (where the color is function of (x mod 2) + 2 * (y mod 2))

N. J. A. Sloane, Central portion of spiral in A275609 showing just the 4's [Entries 0,1,2,3 in the spiral have been replaced by dots. The central 0 has been changed to an X. The illustration shows cells (x,y) with -35 <= x <= 35, -33 <= y <= 36.]

CROSSREFS

Cf. A275609, A307188-A307191.

Sequence in context: A139530 A138368 A118071 * A147207 A146877 A309720

Adjacent sequences:  A307189 A307190 A307191 * A307193 A307194 A307195

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.)