The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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mod 2)) N. J. A. Sloane, Central portion of spiral in A275609 showing just the 4's [Entries 0,1,2,3 in the spiral have been replaced by dots.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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified November 30 08:29 EST 2022. Contains 358438 sequences. (Running on oeis4.)