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 A340301 #12 Jan 04 2021 14:21:08 %S A340301 0,2,3,8,10,12,14,24,27,30,33,36,39,42,45,64,68,72,76,80,84,88,92,96, %T A340301 100,104,108,112,116,120,124,160,165,170,175,180,185,190,195,200,205, %U A340301 210,215,220,225,230,235,240,245,250,255,260,265,270,275,280,285,290 %N A340301 a(n) = n * floor(log_2(n)). %H A340301 Alois P. Heinz, <a href="/A340301/b340301.txt">Table of n, a(n) for n = 1..10000</a> %F A340301 a(n) = n * A000523(n). %F A340301 a(n) = A326299(n) - A336018(n). %p A340301 a:= n-> n*ilog2(n): %p A340301 seq(a(n), n=1..60); %Y A340301 Cf. A000523, A061717, A326299, A336018. %K A340301 nonn %O A340301 1,2 %A A340301 _Alois P. Heinz_, Jan 03 2021