A162131 - OEIS

A162131

Number of n X n symmetric 0..6 arrays with rows, considered as 7-ary numbers, in strictly increasing order

%I #5 Dec 18 2015 18:17:23

%S 7,168,20664,13420008,48646451448,1026088816521384,

%T 129626970213767748408,100146990341371129870445928,

%U 480706456216438726881369732950904,14515325887679952129833652850645598932008

%N Number of n X n symmetric 0..6 arrays with rows, considered as 7-ary numbers, in strictly increasing order

%H R. H. Hardin, <a href="/A162131/b162131.txt">Table of n, a(n) for n=1..11</a>

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 25 2009