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 A141414 #12 Sep 11 2019 22:48:00 %S A141414 1,3,5,7,13,41,113,311,1821,10267,74587,1015453,12550793 %N A141414 Least k for which A140361(n) = k. %H A141414 <a href="/index/Com#complexity">Index to sequences related to the complexity of n</a> %e A141414 a(1) = 3: 3 can be written as 2+1, requiring 1 operation %e A141414 a(2) = 5: 5 = (2+1)+2, the lowest number requiring 2 operations %e A141414 a(3) = 7: ((2+2)+1)+2, the lowest number requiring 3 operations %e A141414 a(4) = 13: (2+1)*3+2+2 (Note: 3 = 2+1 reused) %e A141414 a(5) = 41: (2+1)*2*6+3+2 (3 = 2+1 reused, 6 = 3*2 reused) %e A141414 a(6) = 113: ((2+1)*3+3+1)*9-4 %e A141414 a(7) = 311: ((2+1)*3*3+1)*(9+2)+3 %e A141414 a(8) = 1821: (2+(2+1))*(3+(2+2)*4)*19+16 %e A141414 a(9) = 10267: (1+(2+(2+1))*(3*3))*(5*45-2)+9 %e A141414 a(10) = 74587: (2+1)*(((2*(3*3)*9-2)-3)*157+160)+160 %Y A141414 Cf. A217032. %K A141414 hard,more,nonn %O A141414 0,2 %A A141414 _Leonid Broukhis_, Aug 04 2008 %E A141414 Comment removed and three new entries added by Jeffrey Wang (jeffreyw(AT)stanford.edu), Oct 10 2009 %E A141414 a(11)-a(12) from _Gil Dogon_, Apr 25 2013