0,5
Cheng-Sloane, Discrete Math. vol. 83 pp. 205-212 1990.
Table of n, a(n) for n=0..8.
Cf. A014488.
Sequence in context: A235170 A252414 A333721 * A122707 A347200 A057327
Adjacent sequences: A030058 A030059 A030060 * A030062 A030063 A030064
nonn,fini,full
N. J. A. Sloane.
approved