login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

a(n) is the number of contractible cellular fake surfaces of complexity n.
0

%I #42 Jul 07 2024 21:13:40

%S 2,17,238,4618

%N a(n) is the number of contractible cellular fake surfaces of complexity n.

%C For n = 1..4, this coincides with the number of acyclic cellular fake surfaces of complexity n.

%H Lucas Fagan, <a href="https://github.com/lucasfagan/Fake-Surfaces">Classification data</a>.

%H Lucas Fagan, Yang Qui, and Zhenghan Wang, <a href="https://arxiv.org/abs/2406.09439">Classification of Cellular Fake Surfaces</a>, arXiv:2406.09439 [math.GT], 2024.

%K nonn,more

%O 1,1

%A _Lucas Fagan_, Jun 17 2024