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 A001331 M5395 N2344 #27 Jul 08 2025 16:26:13 %S A001331 1,130,1270932917454,14178431955039102644307345678938144832, %T A001331 19591572513704791799478942287037427963644425946432640042160816616766795992851260047500, %U A001331 1672390093955882094725125078968449171301017629802018367164057251590306327375884442617701277598562886114475651122751129803783336384871488080121922759032559677888042592 %N A001331 Number of n-element algebras with 1 ternary operation. %D A001331 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence). %D A001331 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A001331 M. A. Harrison, <a href="https://doi.org/10.1090/S0002-9939-1966-0200219-9">The number of isomorphism types of finite algebras</a>, Proc. Amer. Math. Soc., 17 (1966), 731-737. %Y A001331 Cf. A091510. %K A001331 nonn,nice %O A001331 1,2 %A A001331 _N. J. A. Sloane_ %E A001331 More terms from Pab Ter (pabrlos(AT)yahoo.com), May 06 2004