A396296 Walk along the hexagonal spiral, with its cells numbered starting at 0, as in A395362. Two players, Black and Red, take turns. When it is Black's turn, he places a (Glinski) queen at the smallest unoccupied cell not attacked by an existing Red queen, and when it is Red's turn, she places a queen at the smallest unoccupied cell not attacked by an existing Black queen. Sequence lists cells not occupied by a queen of either color.

1, 2, 4, 6, 7, 8, 9, 10, 11, 12, 15, 16, 17, 18, 20, 21, 22, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 42, 43, 44, 45, 46, 48, 49, 50, 51, 53, 54, 55, 56, 58, 59, 60, 63, 64, 65, 66, 67, 69, 70, 72, 73, 74, 75, 76, 77, 78, 79, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102

Offset

0,2

Links

N. J. A. Sloane, Table of n, a(n) for n = 0..4999

Jonas Karlsson, The first 20000 queens in the spiral, 10000 of each color

Jonas Karlsson, The first 200000 queens in the spiral

Jonas Karlsson, The first two million queens in the spiral

Crossrefs

Form the union of A396294 and A396295, then take the complement.

Sequence in context: A039240 A039183 A039136 * A299491 A039098 A015860

Adjacent sequences: A396293 A396294 A396295 * A396297 A396298 A396299

Keyword

nonn

Author

Jonas Karlsson and N. J. A. Sloane, May 22 2026

Status

approved