17896831
domain: N
Appears in sequences
- Moebius transform of A000013 (starting at term 0).at n=30A054170
- Number of n-bead necklace structures using exactly two different colored beads.at n=29A056295
- Triangle read by rows, 1 <= k <= n: T(n,k) = non-isomorphic colorings of a toroidal n X k grid using exactly two colors under translational symmetry and swappable colors.at n=19A294791