A309669 Number of ways of placing 2*n-1 nonattacking queens on a hexagonal board with edge-length n in Glinski's hexagonal chess, inequivalent up to rotations and reflections of the board.

1, 0, 0, 1, 0, 0, 0, 1, 0, 3, 0, 7, 30, 133, 581

Offset: 1

Author

Vaclav Kotesovec, Aug 16 2019

Keywords

• nonn
• more

Links

• Chess variants, Glinski's Hexagonal Chess
• Vaclav Kotesovec, All inequivalent solutions for n = 4, 8, 10 and 12
• Wikipedia, Hexagonal chess - Gliński's hexagonal chess

Crossrefs

Cf. A309260, A309746.

Extensions

a(15) from Vaclav Kotesovec, Aug 28 2019