A396172 Consider the square spiral with its cells numbered starting at 0. Seven players take turns and place knights at the smallest unoccupied cell not attacked by an existing knight of a different player. Sequence lists squares occupied by the sixth player.

25, 41, 46, 70, 72, 79, 106, 108, 115, 117, 149, 160, 162, 200, 204, 219, 254, 262, 264, 281, 299, 328, 334, 348, 350, 369, 387, 406, 412, 431, 439, 451, 480, 492, 500, 512, 527, 541, 561, 580, 586, 594, 608, 623, 637, 657, 682, 688, 698, 710, 723, 733, 747

Offset

1,1

Links

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, PARI program

Prog

(PARI) \\ See Links section.

Crossrefs

Cf. A392177, A396167, A396168, A396169, A396170, A396171, A396173, A396174, A396175.

Sequence in context: A354723 A066844 A255608 * A309623 A242074 A366428

Adjacent sequences: A396169 A396170 A396171 * A396173 A396174 A396175

Keyword

nonn

Author

Rémy Sigrist, May 23 2026

Status

approved