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 A280713 #13 Nov 20 2024 09:44:47
%S A280713 1,2,4,7,31,51,771,1401,14841,51129,3679929,3957129,482958729,
%T A280713 927745929,6739632009,27172044009,20949961932009,22047762636009,
%U A280713 6424421468364009,6728534219386089,122581010799226089,2444896564058746089,1126445624341666426089
%N A280713 Partial sums of A055067 where A055067(n) is the product of non-divisors of n.
%C A280713 A055067(n) = the product of non-divisors of n.
%H A280713 Paolo Xausa, <a href="/A280713/b280713.txt">Table of n, a(n) for n = 1..400</a>
%F A280713 a(n) = Sum_{i=1..n} A055067(i).
%t A280713 Accumulate[Array[#!/Times@@Divisors[#] &, 30]]
%o A280713 (Magma) [&+[Factorial(k) / &*[d: d in Divisors(k)]: k in [1..n]]: n in [1..100]];
%Y A280713 Cf. A055067, A280714.
%K A280713 nonn
%O A280713 1,2
%A A280713 _Jaroslav Krizek_, Jan 07 2017