A274926 North spoke of spiral in A274640.

1, 4, 6, 3, 12, 14, 15, 18, 20, 26, 25, 27, 21, 29, 22, 41, 32, 24, 36, 33, 46, 28, 42, 55, 50, 62, 60, 71, 69, 74, 54, 80, 82, 47, 44, 78, 91, 49, 98, 93, 79, 59, 86, 90, 109, 70, 101, 77, 120, 119, 97, 130, 118, 72, 67, 136, 131, 83, 141, 94, 124, 153, 139

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: A264962 A082193 A255767 * A079171 A029678 A123732

Adjacent sequences: A274923 A274924 A274925 * A274927 A274928 A274929

Keyword

nonn

Author

N. J. A. Sloane, Jul 12 2016

Extensions

More terms from Alois P. Heinz, Jul 12 2016

Status

approved