The n X n antelope graph is connected for n >= 8 and traceable for n = 14 and 21 (with the status for 20 and 22-25 unknown).
Table of n, a(n) for n=1..9.
Eric Weisstein's World of Mathematics, Antelope Graph
Eric Weisstein's World of Mathematics, Longest Path
Cf. A307552 (number of longest paths).
Sequence in context: A324603 A322520 A018279 * A133834 A203103 A308164
Adjacent sequences: A307456 A307457 A307458 * A307460 A307461 A307462
Eric W. Weisstein, Apr 09 2019
a(9) from Bert Dobbelaere, Apr 12 2019