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 A064145 #21 Aug 17 2024 13:27:44
%S A064145 1,2,2,4,2,2,4,6,4,16,2,4,2,24,4,8,8,8,4,16,8,4,4,8,4,4,16,32,2,8,2,2,
%T A064145 4,8,4,32,2,16,4,16,16,128,16,32,32,4,16,8,4,32,32,16,64,64,32,64,32,
%U A064145 4,8,16,16,32,16,64,16,128,4,64,32,32,8,16,32,128,8
%N A064145 a(n) = tau(n!-1) or number of divisors of n!-1.
%H A064145 Amiram Eldar, <a href="/A064145/b064145.txt">Table of n, a(n) for n = 2..135</a>
%H A064145 Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/matha1/matha105.htm">Factorizations of many number sequences</a>
%t A064145 Do[ Print[ DivisorSigma[0, n! - 1]], {n, 2, 40} ]
%t A064145 DivisorSigma[0,Range[2,80]!-1] (* _Harvey P. Dale_, Aug 17 2024 *)
%o A064145 (PARI) { f=1; for (n=2, 100, f*=n; if (n>1, a=numdiv(f - 1), a=0); write("b064145.txt", n, " ", a) ) } \\ _Harry J. Smith_, Sep 09 2009
%Y A064145 Cf. A000005, A002582, A027423, A002981, A002982, A064144.
%K A064145 nonn
%O A064145 2,2
%A A064145 _Vladeta Jovovic_, Sep 11 2001
%E A064145 More terms from _Robert G. Wilson v_, Oct 04 2001
%E A064145 a(51)-a(76) from _Harry J. Smith_, Sep 09 2009
%E A064145 Ambiguous term a(1) removed by _Max Alekseyev_, May 06 2022