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 A383336 #11 May 02 2025 12:11:54 %S A383336 1,2,3,5,7,13,23,79,214,1418,5991 %N A383336 Smallest number with shortest addition-multiplication-exponentiation chain of length n. %C A383336 For n >= 1, the largest number with shortest addition-multiplication-exponentiation chain of length n is A173566(n). %e A383336 a(7) = 79 because all smaller numbers have addition-multiplication-exponentiation chains of length at most 6, but the shortest chain for 79 has length 7. One such chain is (1, 2, 3, 5, 32, 37, 42, 79). (There are also such chains that do not use exponentiation, such as (1, 2, 3, 4, 5, 15, 75, 79).) %Y A383336 Cf. A003064, A173566, A383001, A383142, A383335, A383337. %K A383336 nonn,hard,more %O A383336 0,2 %A A383336 _Pontus von Brömssen_, Apr 27 2025