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Number of nXnXn triangular 0..2 arrays with each element equal to at least one neighbor, containing at least one 2 and with new values 0..2 introduced in row major order
0

%I #4 Mar 31 2012 12:36:20

%S 0,0,2,321,44235,13598914,10891389277,23632256605485,

%T 139999109890707779,2266762580564216930099

%N Number of nXnXn triangular 0..2 arrays with each element equal to at least one neighbor, containing at least one 2 and with new values 0..2 introduced in row major order

%e All solutions for 3X3X3

%e ....0......0

%e ...1.0....0.1

%e ..1.2.2..2.2.1

%K nonn

%O 1,3

%A _R. H. Hardin_ Jul 08 2011