%I M1454 #12 Mar 30 2012 16:45:01
%S 2,5,14,38,107
%N Number of domino n-tuples.
%D Problem #139, An Enumeration Problem" by David L. Silverman, J. Rec. Math., 8 (1976), 323-327.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H <a href="/index/Do#domino">Index entries for sequences related to dominoes</a>
%K nonn
%O 1,1
%A _N. J. A. Sloane_.