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a(n) is the number of asymmetrical polyiamonds of n cells.
0

%I #5 Jan 11 2023 13:13:53

%S 0,0,0,0,4,10,36,94,294,794,2300,6394,18266,51592,147426,420512,

%T 1206740,3466876

%N a(n) is the number of asymmetrical polyiamonds of n cells.

%Y Cf. A000577.

%K nonn,more

%O 1,5

%A _John Mason_, Jan 11 2023