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%I #9 Jan 30 2021 01:30:41
%S 12,240,10480,535080,34634544
%N Number of 3 X n Latin rectangles whose second row contains two cycles.
%H 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 Cf. A000186, A094047.
%K nonn,more,uned
%O 4,1
%A _Vladimir Shevelev_, Mar 22 2010
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