This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A337651 #12 Jul 24 2025 10:51:02 %S A337651 2,64,328704,790708092928,1794509410020706222080 %N A337651 Volume of the signed Birkhoff polytope BB(n). %H A337651 Florian Kohl, McCabe Olsen, and Raman Sanyal, <a href="https://arxiv.org/abs/1906.01469">Unconditional reflexive polytopes</a>, arXiv:1906.01469 [math.CO], 2019. Also Discrete and Computational Geom., 64:2 (2020), 427-452. %F A337651 a(n) = A337650(n) * 2^(n^2). - _Andrei Zabolotskii_, Jul 24 2025 %Y A337651 Cf. A337650, A337652, A337653. %K A337651 nonn,more %O A337651 1,1 %A A337651 _N. J. A. Sloane_, Sep 26 2020 %E A337651 a(5) from _Andrei Zabolotskii_, Jul 24 2025