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A238118
Number of continuations with reflective symmetry arising in matrix method for enumerating Hamiltonian cycles on 2n X 2n grid.
3
1, 6, 20, 101, 327, 1560, 5333, 24727, 88422, 403552
OFFSET
1,2
LINKS
KEYWORD
nonn,hard,more
AUTHOR
N. J. A. Sloane, Mar 05 2014
STATUS
approved