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 A077147 #8 May 09 2025 00:52:28
%S A077147 1,6,41,308,2469,20576,176366,1543209,13717421,1234567891,
%T A077147 112233444637,10288065758426,949667608470093,88183420786508665,
%U A077147 8230452606740808761,771604931881950821344,72621640647713018479506
%N A077147 a(n) = floor({concatenation 123 ... up to n}/n).
%F A077147 a(n) = floor(A007908(n) / n). - _Sean A. Irvine_, May 08 2025
%e A077147 a(5) = floor(12345/5) = 2469.
%p A077147 seq(floor(parse(cat(seq(i,i=1..n)))/n),n=1..20); (C. Ronaldo)
%Y A077147 Cf. A007908.
%K A077147 base,nonn
%O A077147 1,2
%A A077147 _Amarnath Murthy_, Oct 30 2002
%E A077147 More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 17 2005