OFFSET
1,2
REFERENCES
F. Faase, On the number of specific spanning subgraphs of the graphs G X P_n, Ars Combin. 49 (1998), 129-154.
Y. H. H. Kwong, Enumeration of Hamiltonian cycles in P_4 X P_n and P_5 X P_n. Ars Combin. 33 (1992), 87-96.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..960
F. Faase, On the number of specific spanning subgraphs of the graphs G X P_n, Preliminary version of paper that appeared in Ars Combin. 49 (1998), 129-154.
F. Faase, Results from the counting program
Y. H. H. Kwong, A Matrix Method for Counting Hamiltonian Cycles on Grid Graphs, European J. of Combinatorics 15 (1994), 277-283.
Index entries for linear recurrences with constant coefficients, signature (11,0,2).
FORMULA
G.f.: x*(1+3*x)/(1-11*x-2*x^3). - Colin Barker, Aug 29 2012
MATHEMATICA
LinearRecurrence[{11, 0, 2}, {1, 14, 154}, 20] (* Harvey P. Dale, Aug 21 2013 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, kwong(AT)cs.fredonia.edu (Harris Kwong), Frans J. Faase
EXTENSIONS
More terms from Harvey P. Dale, Aug 21 2013
STATUS
approved