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 A052338 #12 Mar 04 2019 10:36:00 %S A052338 0,1,0,1,1,1,2,2,4,11,16,43,87,123,250,736,2189,3152,9501,19909,28861, %T A052338 88250,186540,575703,2605063,5556059,8118935,17356074,25389718, %U A052338 54388168,789812633,1700415401,5380882786,7903301746,54185536387,79678647536,253610377475 %N A052338 a(n) = A050443(n-th prime)/(n-th prime). %H A052338 Seiichi Manyama, <a href="/A052338/b052338.txt">Table of n, a(n) for n = 1..1000</a> %o A052338 (PARI) a(n) = my(p = prime(n)); polcoef((4-x^3)/(1-x^3-x^4) + O(x^(p+1)), p)/p; \\ _Michel Marcus_, Mar 04 2019 %Y A052338 Cf. A000040, A001608, A050443. %K A052338 easy,nonn %O A052338 1,7 %A A052338 _Christian G. Bower_, Dec 23 1999 %E A052338 Corrected by _Seiichi Manyama_, Mar 04 2019