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%I #10 Jun 01 2018 06:01:43
%S 1,2,6,20,87,420,2254,12676,73819,438795,2649555,16188915,99888892,
%T 621428188,3893646748,24548337096,155622071065,991375878185,
%U 6343073841027
%N The number of flat-foldable single vertex crease patterns with unit angle Pi/n.
%H K. Ouchi and R. Uehara, <a href="https://doi.org/10.1007/978-3-319-53925-6_2">Efficient Enumeration of Flat-Foldable Single Vertex Crease Patterns</a>, In WALCOM: Algorithms and Computation. WALCOM 2017. Lecture Notes in Computer Science, vol 10167 (pp. 19-29), 2017, Springer, Cham. Gives incorrect a(12).
%Y Cf. A293031.
%K nonn,more
%O 1,2
%A _Koji Ouchi_, May 21 2018