A174556 Number of 3 X n Latin rectangles whose second row contains two cycles.
12, 240, 10480, 535080, 34634544
Offset: 4
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.