A324775 - OEIS

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A324775

North-East spoke of spiral in A274641.

0

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

(list; graph; refs; listen; history; text; internal format)

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