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Number of n X n symmetric 0..3 arrays with rows, considered as 4-ary numbers, in nondecreasing order
1

%I #5 Dec 18 2015 18:17:22

%S 4,34,784,55759,12899284,10000841284,26576772382759,

%T 246536065153505959,8102697426477665232634,

%U 955064733192276340384536034,407800526115803629512654763147159

%N Number of n X n symmetric 0..3 arrays with rows, considered as 4-ary numbers, in nondecreasing order

%H R. H. Hardin, <a href="/A162079/b162079.txt">Table of n, a(n) for n=1..13</a>

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 25 2009