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 A048534 #13 Feb 16 2025 08:32:40 %S A048534 2,272,20022,210222,2127222,112222242,1329222222,222721228422, %T A048534 222222202620,12225222042222,222922622262242,22222622629269222, %U A048534 222262242222052122,22222222222226402,222222624222746822222,13222522222222257222852,222222225263222925292272 %N A048534 Smallest oblong (promic) number containing exactly n 2's. %H A048534 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PronicNumber.html">Pronic Number</a> %Y A048534 Cf. A048533, A002378. %Y A048534 Cf. A048530, A048532, A048536, A048538, A048540, A048542, A048544, A048546, A048548. %K A048534 nonn,base %O A048534 1,1 %A A048534 _Patrick De Geest_, May 15 1999 %E A048534 a(15)-a(17) from _Giovanni Resta_, Oct 09 2019