A324777 North-West spoke of spiral in A274641.

0, 1, 2, 3, 7, 8, 6, 10, 13, 9, 21, 28, 17, 18, 24, 25, 19, 29, 32, 27, 30, 31, 44, 66, 40, 33, 37, 43, 47, 50, 48, 99, 54, 51, 57, 52, 59, 60, 63, 62, 120, 74, 69, 64, 70, 71, 82, 80, 73, 78, 83, 81, 85, 87, 84, 86, 175, 94, 95, 92, 105, 102, 108, 111, 104

Offset

0,3

Links

Table of n, a(n) for n=0..64.

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 A324774-A324781. To get them, subtract 1 from A274924-A274931, respectively.

Sequence in context: A011027 A100072 A215722 * A244162 A182516 A089008

Adjacent sequences: A324774 A324775 A324776 * A324778 A324779 A324780

Keyword

nonn

Author

N. J. A. Sloane, Jul 05 2019

Status

approved