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 A194698 #17 Oct 23 2021 14:07:29 %S A194698 0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, %T A194698 1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3, %U A194698 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4 %N A194698 a(n) = floor((n - 1)/12) - floor((n^2 - 1)/(24*n)). %C A194698 A similar formula for prime indices is mentioned in the abstract of the Folson-Kent-Ono paper (See A194699). %t A194698 Table[Floor[(n-1)/12]-Floor[(n^2-1)/(24n)],{n,90}] (* _Harvey P. Dale_, Oct 23 2021 *) %Y A194698 Cf. A000041, A194699. %K A194698 nonn,easy %O A194698 1,37 %A A194698 _Omar E. Pol_, Jan 18 2012