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 A121994 #14 Feb 16 2025 08:33:02 %S A121994 1,33,333,333111,33333333333333333333333333333333311111111111 %N A121994 Smallest natural number that yields a sequence of n decreasing numbers under the "Look and Say" operator A045918. %C A121994 a(5) <= 33333333333333333333333333333333 '3's concatenated with 1111111111 '1's. - _Tyler Busby_, Feb 07 2023 %H A121994 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/LookandSaySequence.html">Look and Say</a>. %e A121994 a(3)=333111 because under the Look and Say operator sequence A045918 it yields: 3331, 3311, 2321 which are all decreasing (3 in a row). The next term would be 12131211 which is greater than 2321. %Y A121994 Cf. A045918, A005150, A005341, A023989, A079475. %K A121994 hard,more,nonn,base %O A121994 0,2 %A A121994 _Sergio Pimentel_, Sep 11 2006 %E A121994 a(4) from _Sergio Pimentel_, Mar 05 2008 %E A121994 a(4) corrected by _Tyler Busby_, Feb 07 2023