%I
%S 1,0,0,0,0,1,0,0,2,0,4,2,9,9,22,32,66,104,200,348,646,1172,2144,3964,
%T 7285,13581,25136,47070,87700,164764,309308,582152,1098698,2074484
%N a(n) is the number of fixed polyominoes with sprawl n.
%C The sprawl of a polyomino is the number of cells in a polyomino plus the number of cells adjacent to it.
%H Sean A. Irvine, <a href="https://github.com/archmageirvine/joeis/blob/master/src/irvine/oeis/a338/A338212.java">Java program</a> (github)
%F Antidiagonal sums of A338210.
%Y Cf. A001168, A338210, A338213.
%K nonn,more
%O 0,9
%A _Sean A. Irvine_ and _Allan C. Wechsler_, Oct 17 2020
