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Number of n X n symmetric 0..8 arrays with rows, considered as 9-ary numbers, in strictly increasing order
0

%I #4 Dec 18 2015 18:17:23

%S 9,360,92640,161285760,2017447626240,189005833196636160,

%T 136458103771080331223040,775113475209991141795962716160,

%U 35190097760167101079770524663781130240

%N Number of n X n symmetric 0..8 arrays with rows, considered as 9-ary numbers, in strictly increasing order

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 25 2009