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A324774 East spoke of spiral in A274641. 9
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified January 22 02:46 EST 2022. Contains 350481 sequences. (Running on oeis4.)