1,2

Table of n, a(n) for n=1..8.

Cf. A005130 (Robbins numbers).

Cf. A050204 (entries in each row or column sum to 1).

Sequence in context: A206157 A102747 A122524 * A307329 A162634 A235470

Adjacent sequences: A229162 A229163 A229164 * A229166 A229167 A229168

nonn,more

Eric W. Weisstein, Sep 25 2013

Additional terms from R. H. Hardin, Sep 25 2013

approved