A274928 West spoke of spiral in A274640.

1, 3, 5, 6, 7, 15, 10, 17, 13, 25, 14, 31, 20, 33, 34, 38, 35, 36, 23, 41, 52, 47, 53, 44, 30, 54, 61, 50, 51, 57, 71, 78, 81, 72, 79, 86, 93, 74, 91, 89, 98, 102, 105, 56, 106, 82, 97, 88, 95, 87, 59, 110, 68, 85, 125, 84, 126, 128, 116, 144, 92, 127, 142

Offset

0,2

Links

Alois P. Heinz, Table of n, a(n) for n = 0..1000

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 A274924-A274931.

Sequence in context: A154535 A006754 A281725 * A163620 A227722 A250419

Adjacent sequences: A274925 A274926 A274927 * A274929 A274930 A274931

Keyword

nonn

Author

N. J. A. Sloane, Jul 12 2016

Extensions

More terms from Alois P. Heinz, Jul 12 2016

Status

approved