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 A301707 #11 Apr 11 2018 03:03:24
%S A301707 0,4,15,20,50,60,119,136,153,170,308,336,533,574,615,656,986,1044,
%T A301707 1463,1540,1617,1694,2300,2400,2500,2600,2700,2800,3741,3870,4960,
%U A301707 5120,5280,5440,5600,5760,7289,7486,7683,7880,9758,9996,12083,12364,12645,12926,15416,15744
%N A301707 a(n) = n * Sum_{k prime<=n} k.
%F A301707 a(n) = n * A034387(n).
%e A301707 a(6) = 6 * Sum_{k primes<=6} = 6 * (2+3+5) = 6 * 10 = 60.
%t A301707 Array[# Sum[Prime@ i, {i, PrimePi@ #}] &, 48] (* _Michael De Vlieger_, Apr 10 2018 *)
%o A301707 (PARI) a(n) = n*sum(k=1, n, k*isprime(k)); \\ _Michel Marcus_, Mar 26 2018
%Y A301707 Cf. A034387.
%K A301707 nonn
%O A301707 1,2
%A A301707 _Pedro Caceres_, Mar 25 2018
%E A301707 More terms from _Michel Marcus_, Apr 09 2018