%I #14 Oct 31 2023 12:05:42

%S 0,0,4,16,53,172,568,1906,6471,22200,76884,268350,942649,3329606,

%T 11817580,42120338,150682448,540832272,1946892840,7027047846,

%U 25424079337,92185846606,334925007126,1219054432488,4444545298877,16229462702150,59347661054362

%N a(n) = A066158(n)-2 with a(0)=1.

%H Gadi Aleksandrowicz and Gill Barequet, <a href="https://doi.org/10.1007/978-3-642-21204-8_13">Parallel Enumeration of Lattice Animals</a>, in Frontiers in Algorithmics and Algorithmic Aspects in Information and Management, Lecture Notes in Computer Science, 2011, Volume 6681/2011, 90-99. See the table of A_2^(PT)(n).

%Y Cf. A066158, A006762, A192075, A192076, A192077.

%K nonn

%O 1,3

%A _N. J. A. Sloane_, Jun 22 2011