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%I #11 May 01 2013 18:52:56
%S 1,1,3,141
%N Number of different patterns using tiles from 1*1 to 1*n with each tile flush or diagonal to at least one other.
%C Similar to A214366, but we can also have:
%C xxx xxxo
%C oo + o
%C +
%C etc...
%e The 3 cases for n=2 are:
%e oo+ oo oo
%e + +
%Y Cf. A214366.
%K nonn
%O 0,3
%A _Jon Perry_, Apr 16 2013