A324774 East spoke of spiral in A274641.

0, 1, 3, 7, 10, 11, 15, 8, 18, 23, 21, 17, 26, 25, 20, 36, 42, 38, 39, 48, 27, 28, 31, 45, 54, 59, 44, 47, 65, 72, 69, 75, 82, 76, 64, 74, 41, 61, 93, 95, 100, 102, 66, 62, 111, 79, 112, 57, 106, 63, 107, 119, 108, 68, 123, 129, 139

Offset

0,3

Links

Table of n, a(n) for n=0..56.

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: A188091 A190677 A310177 * A213687 A226934 A238506

Adjacent sequences: A324771 A324772 A324773 * A324775 A324776 A324777

Keyword

nonn

Author

N. J. A. Sloane, Jul 05 2019

Status

approved