A324779 South-West spoke of spiral in A274641.

0, 3, 5, 4, 13, 9, 10, 22, 15, 17, 20, 23, 18, 28, 45, 43, 29, 30, 57, 35, 32, 42, 40, 38, 39, 78, 77, 82, 46, 90, 56, 61, 55, 53, 60, 62, 58, 65, 114, 64, 72, 71, 74, 75, 130, 143, 91, 83, 80, 70, 81, 86, 163, 99, 171, 105, 103, 173, 178, 181, 104, 100, 190

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: A284048 A326119 A201271 * A167808 A161353 A360449

Adjacent sequences: A324776 A324777 A324778 * A324780 A324781 A324782

Keyword

nonn

Author

N. J. A. Sloane, Jul 05 2019

Status

approved