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 A162578 #23 Dec 27 2022 02:27:42
%S A162578 1,2,4,6,10,12,18,20,26,30,40,42,54,60,64,68,84,90,108,112,118,128,
%T A162578 150,152,172,184,202,208,236,240,270,278,288,304,316,322,358,376,388,
%U A162578 392,432,438,480,490,502,524,570,574,616,636,652,664,716,734,754,760,778
%N A162578 Partial sums of A002322.
%H A162578 G. C. Greubel, <a href="/A162578/b162578.txt">Table of n, a(n) for n = 1..10000</a>
%H A162578 Paul Erdős, Carl Pomerance, and Eric Schmutz, <a href="https://doi.org/10.4064/aa-58-4-363-385">Carmichael's lambda function</a>, Acta Arithmetica, Vol. 58, No. 4 (1991), pp. 363-385; <a href="https://math.dartmouth.edu/~carlp/PDF/lambda.pdf">alternative link</a>.
%F A162578 a(n) = Sum_{k=1..n} A002322(k).
%F A162578 a(n) = (n^2/log(n)) * exp(B * (log(log(n))/log(log(log(n)))) * (1 + o(1))), where B = A218342 (Erdős et al., 1991). - _Amiram Eldar_, Dec 27 2022
%p A162578 read("transforms3") ; a002322 := BFILETOLIST("b002322.txt") : A162578 :=proc(n) global a002322 ; local i; add(op(i,a002322),i=1..n) ; end: seq(A162578(n),n=1..120) ; # _R. J. Mathar_, Jul 16 2009
%t A162578 Accumulate[CarmichaelLambda[Range[60]]] (* _Harvey P. Dale_, Sep 21 2011 *)
%o A162578 (PARI) a(n) = sum(i=1, n, lcm(znstar(i)[2])) \\ _Felix Fröhlich_, Jul 04 2018
%Y A162578 Cf. A002322, A218342.
%K A162578 easy,nonn
%O A162578 1,2
%A A162578 _Jonathan Vos Post_, Jul 06 2009
%E A162578 a(13) corrected and more terms added by _R. J. Mathar_, Jul 16 2009