A274925 Northeast spoke of spiral in A274640.

1, 3, 2, 9, 7, 8, 12, 15, 13, 17, 20, 22, 26, 42, 27, 25, 28, 50, 35, 32, 37, 34, 38, 68, 48, 49, 80, 45, 53, 85, 93, 51, 52, 95, 60, 55, 67, 70, 116, 64, 129, 69, 77, 133, 74, 142, 86, 89, 94, 153, 90, 152, 96, 97, 88, 98, 102, 170, 103, 109, 99, 190, 186

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: A360648 A359036 A021756 * A084398 A118306 A237651

Adjacent sequences: A274922 A274923 A274924 * A274926 A274927 A274928

Keyword

nonn

Author

N. J. A. Sloane, Jul 12 2016

Extensions

More terms from Alois P. Heinz, Jul 12 2016

Status

approved