A174556 Number of 3 X n Latin rectangles whose second row contains two cycles.

12, 240, 10480, 535080, 34634544

Offset

4,1

Links

Table of n, a(n) for n=4..8.

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

Cf. A000186, A094047.

Sequence in context: A282789 A012542 A009166 * A012349 A012302 A012543

Adjacent sequences: A174553 A174554 A174555 * A174557 A174558 A174559

Keyword

nonn,more,uned

Author

Vladimir Shevelev, Mar 22 2010

Status

approved