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%I #20 Jul 29 2020 10:09:01
%S 1,4,35,1280,262292,205515653
%N Number of aligned free polyominoes that will fit in a square of size n X n.
%C a(n) is the number of free polyominoes that have both width and height <= n. Compare this to _Craig Knecht_'s A268311 which has both height and width = n. The word "aligned" in the title refers to the restriction that the polyominoes have edges parallel to the sides of the square, in contrast with A268427.
%Y Cf. A268311, A268427.
%K nonn,more
%O 1,2
%A _John Mason_, Feb 04 2016
%E a(6) from _Talmon Silver_, Jul 29 2020
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