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%I #4 Jun 03 2014 09:10:48
%S 1,55,237472,371654153,757341382671,1450226501771584,
%T 2820152941289640505,5463664833842177843423,
%U 10594819370472223969569120,20540255065209806005525289313,39823725482559144291828665014967,77209746313875957204633819730760448
%N Number of ways to reciprocally link elements of an n X 9 array either to themselves or to exactly one king-move neighbor.
%H Alois P. Heinz, <a href="/A243315/b243315.txt">Table of n, a(n) for n = 0..100</a>
%Y Column k=9 of A220644.
%K nonn
%O 0,2
%A _Alois P. Heinz_, Jun 03 2014
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