%I #6 Mar 31 2012 10:32:25
%S 0,0,0,21,390,3427,18380,73413,237459,659774,1629116,3666785,7651680
%N Number of quasi-pentominoes in an n X n bounding box.
%H Erich Friedman, <a href="/A094172/a094172.gif">Illustration of initial terms</a>
%e See A094170 for example of similar sequence.
%Y Cf. A094170, A094171.
%K nonn
%O 0,4
%A _Jon Wild_, May 07 2004
%E Corrected and extended by _Jon Wild_, May 11 2004