1,2

Jocelyn Quaintance, Combinatoric Enumeration of Two-Dimensional Proper Arrays, Discrete Math., 307 (2007), 1844-1864.

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

See Quaintance reference for generating functions that produce A129872-A129886.

Sequence in context: A217976 A156801 A057580 * A055094 A055729 A317735

Adjacent sequences: A129872 A129873 A129874 * A129876 A129877 A129878

nonn,more

N. J. A. Sloane, May 26 2007

approved