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A174561
Number of 3 X n Latin rectangles whose second row contains two cycles with the same order of its elements, e.g., the cycle (x_2, x_3, ..., x_k, x_1) with x_1 < x_2 < ... < x_k.
2
12, 120, 2020, 32410, 563948
OFFSET
4,1
LINKS
V. S. Shevelev, Reduced Latin rectangles and square matrices with equal row and column sums, Diskr. Mat.(J. of the Akademy of Sciences of Russia) 4(1992), 91-110.
CROSSREFS
KEYWORD
nonn,more,uned
AUTHOR
Vladimir Shevelev, Mar 22 2010
STATUS
approved