1,3
Ian Wanless, Problem 528, Research Problems from the BCC22, Discrete Math., 311 (2011), page 1083.
Table of n, a(n) for n=1..8.
Sequence in context: A042785 A136682 A107467 * A155881 A041731 A041331
Adjacent sequences: A191422 A191423 A191424 * A191426 A191427 A191428
nonn,more
N. J. A. Sloane, Jun 02 2011
approved