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 A129132 #22 Nov 23 2024 08:33:51
%S A129132 0,1,2,4,5,6,7,10,12,13,14,16,17,18,19,23,24,26,27,29,30,31,32,35,37,
%T A129132 38,41,43,44,45,46,51,52,53,54,56,57,58,59,62,63,64,65,67,69,70,71,75,
%U A129132 77,79,80,82,83,86,87,90,91,92,93,95,96,97,99,105,106,107,108,110,111,112
%N A129132 Partial sums of A051903.
%H A129132 Reinhard Zumkeller, <a href="/A129132/b129132.txt">Table of n, a(n) for n = 1..10000</a>
%F A129132 a(n+1) = a(n) + A051903(n), a(1) = 0;
%F A129132 A128651(a(n-1) + 2) = A007947(n) for n>1.
%F A129132 a(n) ~ c * n, where c is Niven's constant (A033150). - _Amiram Eldar_, Oct 19 2020
%F A129132 a(n) = - Sum_{i=2..n} Sum_{j=1..n} mobius(i)*floor(n/(i^j)). - _Ridouane Oudra_, Nov 22 2024
%t A129132 f[1] = 0; f[n_] := Max @ FactorInteger[n][[;; , 2]]; Accumulate @ Array[f, 70] (* _Amiram Eldar_, Oct 19 2020 *)
%Y A129132 Cf. A007947, A033150, A051903, A128651.
%K A129132 nonn,easy
%O A129132 1,3
%A A129132 _Reinhard Zumkeller_, Mar 30 2007