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Number of n X n symmetric 0..2 arrays with rows, considered as 3-ary numbers, in nondecreasing order
1

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

%S 3,15,151,3495,198503,28534087,10586251623,10294697200775,

%T 26586793509930791,184408340876752843335,3468543642532070124804583,

%U 178388170025664039139771509767,25266393167195209778186849218689703

%N Number of n X n symmetric 0..2 arrays with rows, considered as 3-ary numbers, in nondecreasing order

%H R. H. Hardin, <a href="/A162078/b162078.txt">Table of n, a(n) for n=1..14</a>

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 25 2009