A250112 Number of symmetric primitive Lucas strings of length n.

1, 2, 3, 4, 10, 12, 28, 40, 54, 90, 132, 180, 260, 392, 450, 752, 918, 1404, 1672, 2600, 2898, 4818, 5336, 8424, 9350, 15288, 16254, 26656, 28594, 46530, 49476, 80928, 84810, 140250, 146090, 239760, 250268, 412528, 426036, 702480, 726110, 1196244, 1232208

Offset: 1

Author

N. J. A. Sloane, Nov 19 2014

Keywords

• nonn

Links

• Lars Blomberg, Table of n, a(n) for n = 1..1000
• A. R. Ashrafi, J. Azarija, K. Fathalikhani, S. Klavzar and M. Petkovsek, Vertex and edge orbits of Fibonacci and Lucas cubes, 2014; See Table 3.
• A. R. Ashrafi, J. Azarija, K. Fathalikhani, S. Klavzar, et al., Orbits of Fibonacci and Lucas cubes, dihedral transformations, and asymmetric strings, 2014.

Crossrefs

Cf. A031367, A250113.

Extensions

More terms from Lars Blomberg, Dec 05 2016