%I #6 Apr 02 2016 23:23:45
%S 1,2,9,2089,3144692,2748613397101,107008949868167431857
%N Number of ways to tile an n X n X n cube with 1 X 1 X 1 and 2 X 2 X 2 tiles.
%e There are 9 ways to tile a cube of side length 3 with cubes of side length 1 and 2, so a(3) = 9.
%Y Cf. A063443 (a 2D version of this tiling count).
%K nonn,more
%O 1,2
%A _Johan Nilsson_, Mar 30 2016
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