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 A069533 #8 May 03 2024 20:47:14
%S A069533 0,1,3,5,9,14,19,26,33,42,50,60,71,83,96,110,124,139,157,175,192,210,
%T A069533 231,252,274,297,321,345,369,398,423,451,483,512,544,573,606,639,675,
%U A069533 710,745,785,822,863,902,943,986,1028,1070,1113,1161,1207,1254,1304
%N A069533 a(n) = Sum_{p prime} floor(n^2/p^2) where the sum is over all the primes.
%K A069533 easy,nonn
%O A069533 1,3
%A A069533 _Benoit Cloitre_, Apr 16 2002