0,4
Table of n, a(n) for n=0..6.
P. R. J. Ostergard, Classification of small binary/ternary one-error-correcting codes (Appendix), Discrete Mathematics 223 (2000), 253-262.
Cf. A057574-A057584, A050142.
Sequence in context: A000241 A028723 A213291 * A015635 A027101 A015656
Adjacent sequences: A057575 A057576 A057577 * A057579 A057580 A057581
nonn
N. J. A. Sloane, Oct 04 2000
approved