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 A380230 #11 Jan 17 2025 09:04:09
%S A380230 0,1,4,6,12,15,18,21,32,36,40,44,48,52,56,60,80,85,90,95,100,105,110,
%T A380230 115,120,125,130,135,140,145,150,155,192,198,204,210,216,222,228,234,
%U A380230 240,246,252,258,264,270,276,282,288,294,300,306,312,318,324,330,336,342
%N A380230 a(n) = n*A070939(n).
%H A380230 Paolo Xausa, <a href="/A380230/b380230.txt">Table of n, a(n) for n = 0..10000</a>
%t A380230 Table[n*BitLength[n], {n, 0, 100}]
%Y A380230 Cf. A070939, A110803, A168160.
%K A380230 nonn,base
%O A380230 0,3
%A A380230 _Paolo Xausa_, Jan 17 2025