%I #4 Mar 31 2012 12:35:01
%S 4,208,29568,7452704,2941306368,1683453629440,1323082429842432,
%T 1370418864769445888,1811764909105311267840,2980039854936078219167744,
%U 5972307516078119199647692800
%N Number of ways of arranging the numbers 1 ... 3n into a 3 X n array so there is exactly one local maximum.
%Y A row of the array in A087783. Cf. A007846.
%K nonn
%O 1,1
%A _R. H. Hardin_, Oct 27 2003