A324775 North-East spoke of spiral in A274641.

0, 2, 1, 8, 6, 7, 11, 14, 12, 16, 19, 21, 25, 41, 26, 24, 27, 49, 34, 31, 36, 33, 37, 67, 47, 48, 79, 44, 52, 84, 92, 50, 51, 94, 59, 54, 66, 69, 115, 63, 128, 68, 76, 132, 73, 141, 85, 88, 93, 152, 89, 151, 95, 96, 87, 97, 101, 169, 102, 108, 98, 189, 185

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: A154897 A198577 A011135 * A324124 A019816 A214562

Adjacent sequences: A324772 A324773 A324774 * A324776 A324777 A324778

Keyword

nonn

Author

N. J. A. Sloane, Jul 05 2019

Status

approved