A396133 Consider the square spiral with its cells numbered starting at 0. Six 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 fifth player.

20, 36, 41, 44, 45, 68, 72, 102, 106, 114, 115, 150, 163, 175, 192, 196, 202, 210, 216, 217, 258, 264, 274, 297, 318, 322, 325, 332, 342, 350, 351, 379, 392, 398, 400, 404, 441, 457, 474, 480, 486, 488, 512, 516, 517, 557, 566, 572, 580, 588, 600, 613, 623

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, A396129, A396130, A396131, A396132, A396134, A396135, A396166.

Sequence in context: A335251 A135801 A396126 * A078210 A174628 A316098

Adjacent sequences: A396130 A396131 A396132 * A396134 A396135 A396137

Keyword

nonn

Author

Rémy Sigrist, May 22 2026

Status

approved