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 A191015 #8 Jul 22 2025 12:06:55 %S A191015 1,1,2,3,4,7,9,12,18,25,32,47,61,79,108,143,182,246,315,404,526,674, %T A191015 849,1102,1389,1745,2215,2788,3467,4384 %N A191015 Number of isomorphism classes of Coxeter systems with n reflections. %D A191015 Anders Björner, Francesco Brenti, Combinatorics of Coxeter groups, Graduate Texts in Mathematics, 231. Springer, New York, 2005. %K A191015 nonn %O A191015 1,3 %A A191015 _Matthew J. Samuel_, May 24 2011