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Number of n X n symmetric 0..5 arrays with rows, considered as 6-ary numbers, in strictly increasing order.
1

%I #7 Sep 04 2022 22:13:32

%S 6,105,8225,2926875,4979240000,42202810636875,1834917191105643750,

%T 417950382118605762343750,506715938159533635294561406250,

%U 3310954206264728900087517291318046875

%N Number of n X n symmetric 0..5 arrays with rows, considered as 6-ary numbers, in strictly increasing order.

%H R. H. Hardin, <a href="/A162130/b162130.txt">Table of n, a(n) for n=1..11</a>

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 25 2009