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 A007184 M2113 #21 Jul 08 2025 17:02:38
%S A007184 1,2,18,39366,23841243993846402,
%T A007184 81709849111396536877982595092224988258053033320397747014
%N A007184 a(n) = Product_{k=0..n-1} (2^(2^k - 1) + 1)^C(n,k).
%D A007184 J. Berman, ``Free spectra of 3-element algebras,'' in R. S. Freese and O. C. Garcia, editors, Universal Algebra and Lattice Theory (Puebla, 1982), Lect. Notes Math. Vol. 1004, 1983.
%D A007184 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H A007184 J. Berman, <a href="/A007153/a007153.pdf">Free spectra of 3-element algebras</a>, R. S. Freese and O. C. Garcia, editors, Universal Algebra and Lattice Theory (Puebla, 1982), Lect. Notes Math. Vol. 1004, 1983. (Annotated scanned copy)
%K A007184 nonn
%O A007184 0,2
%A A007184 _N. J. A. Sloane_
%E A007184 Title improved by _Sean A. Irvine_, Nov 12 2017