1,2

Table of n, a(n) for n=1..9.

a(1) = 1 and for n >= 2: a(n) = 2^n * A034841(n) = 2^n * (n^2)! / (n!)^n.

Cf. A034841.

Sequence in context: A088600 A066120 A152687 * A137888 A229333 A108349

Adjacent sequences: A062713 A062714 A062715 * A062717 A062718 A062719

nonn

Ahmed Fares (ahmedfares(AT)my-deja.com), Jul 14 2001

More terms from Vladeta Jovovic, Jul 18 2001

approved