Number of ways of placing 2n nonattacking rooks on a hexagonal board of equilateral triangular spaces with n spaces along each edge.
A375800
Number of ways of placing 2n nonattacking rooks on a hexagonal board of equilateral triangular spaces with n spaces along each edge.
Terms
- a(0) =3a(1) =24a(2) =348a(3) =7812a(4) =255756a(5) =11747504a(6) =714121392
External references
- oeis: A375800