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 A384481 #7 Jun 09 2025 10:38:11 %S A384481 1,2,3,4,6,8,13,24,46,98 %N A384481 Smallest value of f(1) for a function f(x) = b*x+c with nonnegative integer coefficients and a shortest addition-composition chain of length n, starting with 1 and x. %C A384481 See A384480 for details. %e A384481 n | functions b*x+c with b+c = a(n) and shortest chain of length n %e A384481 --+--------------------------------------------------------------- %e A384481 0 | 1, x %e A384481 1 | 2, x+1, 2*x %e A384481 2 | 3, x+2, 2*x+1, 3*x %e A384481 3 | 3+x, x+3 %e A384481 4 | 5+x, x+5 %e A384481 5 | 7+x, x+7 %e A384481 6 | 11*x+2 %e A384481 7 | 23*x+1 %e A384481 8 | 7*x+39, 43*x+3 %e A384481 9 | 11*x+87 %Y A384481 Cf. A383332 (addition only), A384480, A384482, A384484. %K A384481 nonn,more %O A384481 0,2 %A A384481 _Pontus von Brömssen_, Jun 02 2025