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 A346597 #12 Jul 28 2021 04:29:55
%S A346597 1,3,6,8,13,19,26,30,33,43,54,60,73,87,102,106,123,129,148,158,179,
%T A346597 201,224,236,241,267,276,290,319,349,380,388,421,455,490,496,533,571,
%U A346597 610,630,671,713,756,778,793,839,886,898,905,915,966,992,1045,1063,1118,1146,1203,1261,1320,1350,1411
%N A346597 Partial sums of A019554.
%H A346597 Amiram Eldar, <a href="/A346597/b346597.txt">Table of n, a(n) for n = 1..10000</a>
%F A346597 a(n) = Sum_{k=1..n} A019554(k) ~ 3*zeta(3)*n^2 / Pi^2. - _Vaclav Kotesovec_, Sep 18 2020 [Copied from A019554]
%o A346597 (PARI) a(n) = sum(k=1, n, k/core(k, 1)[2]); \\ _Michel Marcus_, Jul 27 2021
%Y A346597 Cf. A019554.
%K A346597 nonn
%O A346597 1,2
%A A346597 _N. J. A. Sloane_, Jul 27 2021