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 A034762 #8 Mar 01 2019 08:06:59 %S A034762 1,5,7,18,13,40,21,61,44,74,41,157,51,120,113,194,71,261,81,293,179, %T A034762 220,103,542,162,278,256,461,137,654,145,587,331,386,321,1033,189,440, %U A034762 409,1000,215,1032,225,829,720,554,247,1711,384,913,567,1035,293,1468 %N A034762 Dirichlet convolution of primes (with 1) with sigma(n). %o A034762 (PARI) pbc(n) = if (n==1, 1, prime(n-1)); %o A034762 a(n) = sumdiv(n, d, pbc(d)*sigma(n/d)); \\ _Michel Marcus_, Feb 28 2019 %Y A034762 Cf. A000203, A008578. %K A034762 nonn %O A034762 1,2 %A A034762 _Erich Friedman_