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%I #10 Mar 18 2023 11:36:30
%S 1,1,9,21,115,521,1494,15129,83609,459957,2551794,14150081,78597739
%N Number of inequivalent tilings of a 6 X n rectangle using integer-sided square tiles.
%Y Column k = 6 of A227690.
%Y Sequences for fixed and free (inequivalent) tilings of m X n rectangles, for 2 <= m <= 10:
%Y Fixed: A000045, A002478, A054856, A054857, A219925, A219926, A219927, A219928, A219929.
%Y Free: A001224, A359019, A359020, A359021, A359022, A359023, A359024, A359025, A359026.
%K nonn,more
%O 0,3
%A _John Mason_, Dec 12 2022
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