A324778 West spoke of spiral in A274641.

0, 2, 4, 5, 6, 14, 9, 16, 12, 24, 13, 30, 19, 32, 33, 37, 34, 35, 22, 40, 51, 46, 52, 43, 29, 53, 60, 49, 50, 56, 70, 77, 80, 71, 78, 85, 92, 73, 90, 88, 97, 101, 104, 55, 105, 81, 96, 87, 94, 86, 58, 109, 67, 84, 124, 83, 125, 127, 115, 143, 91, 126, 141

Offset

0,2

Links

Table of n, a(n) for n=0..62.

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: A331624 A191165 A360994 * A058637 A026473 A272929

Adjacent sequences: A324775 A324776 A324777 * A324779 A324780 A324781

Keyword

nonn

Author

N. J. A. Sloane, Jul 05 2019

Status

approved