A397053 Consider the Hilbert curve with its cells numbered starting at 0. Two players take turns and place knights at the smallest unoccupied cell not attacked by an existing knight of the other player. Sequence lists cells occupied by the second player.

1, 3, 4, 6, 16, 19, 21, 22, 23, 26, 37, 38, 42, 43, 46, 49, 53, 59, 60, 63, 66, 73, 75, 80, 82, 85, 87, 90, 96, 102, 103, 106, 110, 113, 126, 130, 131, 132, 133, 134, 137, 144, 150, 151, 154, 158, 160, 166, 167, 170, 174, 177, 184, 187, 188, 190, 191, 195, 198

Offset

1,2

Links

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

Rémy Sigrist, PARI program

Prog

(PARI) \\ See Links section.

Crossrefs

Cf. A392177, A397052, A397054, A397055.

Sequence in context: A347056 A089249 A173944 * A092933 A122849 A068573

Adjacent sequences: A397050 A397051 A397052 * A397054 A397055 A397056

Keyword

nonn

Author

Rémy Sigrist, Jun 18 2026

Status

approved