A139772 - OEIS

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A139772

Number of linear trimer coverings of a 3n X 3n square.

%I #9 Feb 16 2022 23:22:41

%S 2,64,37160,378875648,67433401509980,209087783283413477232,

%T 11281654633785546173131745084

%N Number of linear trimer coverings of a 3n X 3n square.

%D J. Van Craen, The residual entropy of rectilinear trimers on the square lattice at close packing, J. Chem. Phys. 63 (1975) 2591-2596.

%Y Cf. A004003.

%K nonn,more

%O 1,1

%A _Steven Finch_, May 20 2008

%E Name corrected and a(6)-a(7) from _Andrew Howroyd_, Feb 16 2022