A274927 Northwest spoke of spiral in A274640.

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

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 A370662 A047453

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