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%I #25 May 02 2023 14:41:22
%S 1,1,1,3,4,12,24,66,159,444,1161,3226,8785,24453,67716,189309,528922,
%T 1484738,4172185,11756354,33174451,93795220,265565628,753060469,
%U 2138206966,6078931114,17302380313,49302121747,140627400927,401510058179
%N Number of polyiamonds with n cells, without holes.
%C If holes are allowed, we get A000577.
%H Greg Huber, Craig Knecht, Walter Trump, and Robert M. Ziff, <a href="https://arxiv.org/abs/2304.14388">Riddles of the sphinx tilings</a>, arXiv:2304.14388 [cond-mat.stat-mech], 2023.
%H Elena V. Konstantinova and Maxim V. Vidyuk, <a href="http://dx.doi.org/10.1021/ci025659y">Discriminating tests of information and topological indices. Animals and trees</a>, J. Chem. Inf. Comput. Sci. 43 (2003), 1860-1871.
%H Hai Pham-Van, Linh Tran-Phan-Thuy, Cuong Tran-Manh, Bich Do-Danh, and Hoang Luc-Huy, <a href="https://doi.org/10.3390/nano10010156">Two-Dimensional Clusters of Colloidal Particles Induced by Emulsion Droplet Evaporation</a>, Nanomaterials (2020) Vol. 10, 156.
%Y Equals A000577(n)-A070764(n). Cf. A000104, A018190.
%K hard,nonn
%O 1,4
%A _Joseph Myers_, May 05 2002
%E More terms from _Joseph Myers_, Nov 11 2003
%E a(29) and a(30) from _Joseph Myers_, Nov 21 2010
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