A174560 Number of 3 X n Latin rectangles whose second row has cycles of even length only.
0, 24, 0, 18000, 0, 52254720
Offset: 3
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.