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 A173397 #10 Jul 18 2022 02:33:23
%S A173397 1,2,4,6,11,15,22,29,40,49,57,63,72,76,82,104,114,118,126,130,139,143,
%T A173397 150,155,183,190,205,219,227,231,243,250,254,256,262,284,295,299,301,
%U A173397 309,319,323,333,337,346,348,354,358,398,407,409,412,420,424,432,441
%N A173397 Partial sums of A000019.
%C A173397 Partial sums of number of primitive permutation groups of degree n. The subsequence of primes in this partial sum begins: 2, 11, 29, 139, 227, 337, 409, 463, 563, 593, 821, 853, 881 (and other powers include 243). The subsequence of squares in this partial sum begins: 1, 4, 49, 256, 441, 576.
%H A173397 Vaclav Kotesovec, <a href="/A173397/b173397.txt">Table of n, a(n) for n = 1..4095</a>
%F A173397 a(n) = Sum_{i=1..n} A000019(i).
%t A173397 Cases[Import["https://oeis.org/A000019/b000019.txt", "Table"], {_, _}][[All, 2]] // Accumulate (* _Jean-François Alcover_, Jan 03 2020 *)
%Y A173397 Cf. A000019, A000001, A023675, A023676, A000638, A002106, A005432, A000637.
%K A173397 nonn
%O A173397 1,2
%A A173397 _Jonathan Vos Post_, Feb 17 2010