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A274927 Northwest spoke of spiral in A274640. 1

%I

%S 1,2,3,4,8,9,7,11,14,10,22,29,18,19,25,26,20,30,33,28,31,32,45,67,41,

%T 34,38,44,48,51,49,100,55,52,58,53,60,61,64,63,121,75,70,65,71,72,83,

%U 81,74,79,84,82,86,88,85,87,176,95,96,93,106,103,109,112,105

%N Northwest spoke of spiral in A274640.

%H Alois P. Heinz, <a href="/A274927/b274927.txt">Table of n, a(n) for n = 0..1000</a>

%H F. Michel Dekking, Jeffrey Shallit, and N. J. A. Sloane, <a href="https://www.combinatorics.org/ojs/index.php/eljc/article/view/v27i1p52/8039">Queens in exile: non-attacking queens on infinite chess boards</a>, Electronic J. Combin., 27:1 (2020), #P1.52.

%Y Cf. A274640, A274641. The 8 spokes are A274924-A274931.

%K nonn

%O 0,2

%A _N. J. A. Sloane_, Jul 12 2016

%E More terms from _Alois P. Heinz_, Jul 12 2016

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Last modified June 16 14:16 EDT 2021. Contains 345057 sequences. (Running on oeis4.)