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 A377676 #11 Nov 04 2024 01:36:32 %S A377676 2,8,18,40,24,120,48,336,80,192,72,1920,48,288,23040,1728,36,10240,72, %T A377676 7680,432,240,384,32256,640,49152,2016,3840,96,193536,1152,22528,1152, %U A377676 4608,1327104,1638400,96,7680,9216,4128768,384,294912,72,23040,30720,576 %N A377676 a(n) is the number of divisors of n^n - n. %H A377676 Amiram Eldar, <a href="/A377676/b377676.txt">Table of n, a(n) for n = 2..115</a> %F A377676 a(n) = A000005(A061190(n)). %t A377676 a[n_] := DivisorSigma[0, n^n - n]; Array[a, 45, 2] (* _Amiram Eldar_, Nov 04 2024 *) %o A377676 (PARI) a(n) = numdiv(n^n-n); %Y A377676 Cf. A000005, A061190, A334167, A372229, A372599, A377672, A377675, A377677, A377678. %K A377676 nonn %O A377676 2,1 %A A377676 _Sean A. Irvine_, Nov 03 2024