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A274927 Northwest spoke of spiral in A274640. 1
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, 34, 38, 44, 48, 51, 49, 100, 55, 52, 58, 53, 60, 61, 64, 63, 121, 75, 70, 65, 71, 72, 83, 81, 74, 79, 84, 82, 86, 88, 85, 87, 176, 95, 96, 93, 106, 103, 109, 112, 105 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..1000

F. Michel Dekking, Jeffrey Shallit, and N. J. A. Sloane, Queens in exile: non-attacking queens on infinite chess boards, Electronic J. Combin., 27:1 (2020), #P1.52.

CROSSREFS

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

Sequence in context: A211227 A019949 A172002 * A066338 A047453 A037467

Adjacent sequences:  A274924 A274925 A274926 * A274928 A274929 A274930

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jul 12 2016

EXTENSIONS

More terms from Alois P. Heinz, Jul 12 2016

STATUS

approved

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Last modified May 15 10:54 EDT 2021. Contains 343909 sequences. (Running on oeis4.)