A274926 North spoke of spiral in A274640.

1, 4, 6, 3, 12, 14, 15, 18, 20, 26, 25, 27, 21, 29, 22, 41, 32, 24, 36, 33, 46, 28, 42, 55, 50, 62, 60, 71, 69, 74, 54, 80, 82, 47, 44, 78, 91, 49, 98, 93, 79, 59, 86, 90, 109, 70, 101, 77, 120, 119, 97, 130, 118, 72, 67, 136, 131, 83, 141, 94, 124, 153, 139

Offset: 0

Author

N. J. A. Sloane, Jul 12 2016

Keywords

• nonn

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.

Extensions

More terms from Alois P. Heinz, Jul 12 2016