956635
domain: N
Appears in sequences
- Number of n-bead necklaces with 3 colors.at n=15A001867
- Number of distinct n X 3 toroidal 0..2 arrays.at n=4A184280
- Number of distinct n X 5 toroidal 0..2 arrays.at n=2A184282
- Table read by antidiagonals: T(n,k) = number of distinct n X k toroidal 0..2 arrays.at n=23A184284
- Table read by antidiagonals: T(n,k) = number of distinct n X k toroidal 0..2 arrays.at n=25A184284
- a(n) = -(1/n) * Sum_{d|n} phi(n/d) * (-3)^d.at n=14A343465