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 A377673 #10 Nov 04 2024 01:36:23 %S A377673 3,12,72,588,5652,117504,1895712,46503600,839411118,25440307200, %T A377673 474527311344,22404560101168,489294047662728,30902868417576960, %U A377673 1096805935992340800,38000593697802058224,1318965178069293272496,90596485743469636057920,3578317312662511683264000 %N A377673 a(n) is the sum of the divisors of n^n + n. %H A377673 Amiram Eldar, <a href="/A377673/b377673.txt">Table of n, a(n) for n = 1..116</a> %F A377673 a(n) = A000203(A066068(n)). %t A377673 a[n_] := DivisorSigma[1, n^n + n]; Array[a, 20] (* _Amiram Eldar_, Nov 04 2024 *) %o A377673 (PARI) a(n) = sigma(n^n+n); %Y A377673 Cf. A000203, A066068, A366820, A372228, A372546, A377671, A377672, A377674. %K A377673 nonn %O A377673 1,1 %A A377673 _Sean A. Irvine_, Nov 03 2024