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 A282746 #13 Jul 09 2025 06:02:41 %S A282746 1,1,3077244,1,960 %N A282746 Number of 2-(n,3,lambda_min) designs. %C A282746 The corresponding values of lambda_min are 2, 1, 6, 1, 2. %C A282746 Other known terms are a(12) = 242995846, a(13) = 2, a(15) = 80, a(19) = 11084874829. %H A282746 Gholamreza B. Khosrovshahi and Behruz Tayfeh-Rezaie, <a href="https://doi.org/10.1016/j.disc.2008.07.012">Classification of simple 2-(11, 3, 3) designs</a>, Discrete Mathematics 309.3 (2009): 515-520. %Y A282746 Cf. A030129. %K A282746 nonn,more %O A282746 6,3 %A A282746 _N. J. A. Sloane_, Mar 05 2017 %E A282746 Edited by _Andrei Zabolotskii_, Jul 08 2025