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A307189 Positions of 1's in the square spiral in A275609. 2

%I #20 Mar 31 2019 17:26:18

%S 1,4,6,12,23,25,27,33,35,38,40,42,44,54,56,58,64,77,79,81,83,85,95,97,

%T 103,105,107,109,112,114,128,130,132,134,136,142,144,146,156,163,165,

%U 167,169,171,173,175,189,191,201,203,205,207,213,215,234,236,238

%N Positions of 1's in the square spiral in A275609.

%H Alois P. Heinz, <a href="/A307189/b307189.txt">Table of n, a(n) for n = 1..20000</a> (first 1249 terms from N. J. A. Sloane)

%H Rémy Sigrist, <a href="/A307189/a307189.png">Colored scatterplot of (x,y) such that A275609(x,y) = 1 and -500 <= x <= 500 and -500 <= y <= 500</a> (where the color is function of (x mod 2) + 2 * (y mod 2))

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

%K nonn

%O 1,2

%A _N. J. A. Sloane_, Mar 28 2019

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Last modified March 28 04:13 EDT 2024. Contains 371235 sequences. (Running on oeis4.)