A174561 - cp's OEIS frontend

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.

%I A174561 #11 Jan 30 2021 01:50:53
%S A174561 12,120,2020,32410,563948
%N 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.
%H A174561 V. S. Shevelev, <a href="http://mi.mathnet.ru/eng/dm720">Reduced Latin rectangles and square matrices with equal row and column sums</a>, Diskr. Mat.(J. of the Akademy of Sciences of Russia) 4(1992), 91-110.
%Y A174561 Cf. A000179, A000186, A094047, A174560, A174556.
%K A174561 nonn,more,uned
%O A174561 4,1
%A A174561 _Vladimir Shevelev_, Mar 22 2010

cp's OEIS Frontend

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.