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 A330578 #10 Dec 19 2019 09:47:32 %S A330578 0,4,2,0,7,1,7,3,14,4,12,6,21,7,24,16,7,25,5,15,4,26,14,1,11,36,22,34, %T A330578 4,33,17,31,14,46,28,9,23,3,38,17,53,9,25,2,42,18,59,9,52,26,44,64,37, %U A330578 9,57,28,48,18,69,7,60,28,82,49,71,37,2,59,23,81,44 %N A330578 a(n) is the remainder when the sum of the first n composite numbers is divided by the n-th composite number. %H A330578 Rémy Sigrist, <a href="/A330578/b330578.txt">Table of n, a(n) for n = 1..10000</a> %F A330578 a(n) = A053767(n) mod A002808(n). %e A330578 a(3) = (4 + 6 + 8) mod 8 = 2. %o A330578 (PARI) s=0; forcomposite (c=4, 96, s+=c; print1 (s%c", ")) %Y A330578 Cf. A002808, A053767, A071089 (prime variant), A330579 (positions of zeros). %K A330578 nonn %O A330578 1,2 %A A330578 _Rémy Sigrist_, Dec 18 2019