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The number of stones-and-bones tilings of the (3n-1,3n)-benzel when one orientation of bone is forbidden.
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%I #10 Aug 05 2023 21:26:09

%S 1,16,3360,9371648,347950546944,172066422921363456,

%T 1133503548832944876421120

%N The number of stones-and-bones tilings of the (3n-1,3n)-benzel when one orientation of bone is forbidden.

%C See Problem 11 of the Propp article. It is conjectured that a(n) is 2-adically continuous as a function of n.

%H James Propp, <a href="https://arxiv.org/abs/2206.06472">Trimer covers in the triangular grid: twenty mostly open problems</a>, arXiv:2206.06472 [math.CO], 2022.

%Y Cf. A352207, A364481, A364482, A364416, A364417, A364418, A364438.

%K nonn,more

%O 1,2

%A _James Propp_, Jul 26 2023