1,1

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: A003500 A316363 A295760 * A038055 A006385 A322859

Adjacent sequences: A129873 A129874 A129875 * A129877 A129878 A129879

nonn,more

N. J. A. Sloane, May 26 2007

approved