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 A086079 #11 May 05 2024 19:32:40 %S A086079 0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0, %T A086079 0,0,0,0,0,1,1,1,0,0,0,0,1,1,0,0,0,0,1,0,1,0,0,0,0,0,1,1,0,0,1,0,0,1, %U A086079 0,0,1,0,1,0,0,1,0,0,1,0,0,0,0,1,0,0,0,2,0,0,0,1,1,0,0,0,0,0,1,0,0,0,0,0,0 %N A086079 Number of 8's in decimal expansion of triangular number n(n+1)/2. %H A086079 Paolo Xausa, <a href="/A086079/b086079.txt">Table of n, a(n) for n = 0..10000</a> %t A086079 DigitCount[Accumulate[Range[0, 100]], 10, 8] (* _Paolo Xausa_, May 05 2024 *) %Y A086079 Cf. 0's A086071, 1's A086072, 2's A086073, 3's A086074, 4's A086075, 5's A086076, 6's A086077, 7's A086078, 9's A086080. %Y A086079 Cf. A000217. %K A086079 base,nonn %O A086079 0,88 %A A086079 _Jason Earls_, Jul 08 2003