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 A045516 #17 Jul 19 2020 02:13:50 %S A045516 40320,479001600,403291461126605635584000000, %T A045516 4274883284060025564298013753389399649690343788366813724672000000000000, %U A045516 40526919504877216755680601905432322134980384796226602145184481280000000000000 %N A045516 Factorials with initial digit '4'. %C A045516 Benford's law shows that this sequence will contain about (log 5 - log 4)/log 10 =~ 10% of factorials. [_Charles R Greathouse IV_, Nov 13 2010] %C A045516 The next term (a(6)) has 106 digits. - _Harvey P. Dale_, Nov 05 2015 %H A045516 <a href="/index/Be#Benford">Index entries for sequences related to Benford's law</a> %F A045516 a(n) = A000142(A045523(n)). - _Amiram Eldar_, Jul 19 2020 %t A045516 Select[Range[200]!,IntegerDigits[#][[1]]==4&] (* _Harvey P. Dale_, Nov 05 2015 *) %Y A045516 For factorials with initial digit d (1 <= d <= 9) see A045509, A045510, A045511, A045516, A045517, A045518, A282021, A045519; A045520, A045521, A045522, A045523, A045524, A045525, A045526, A045527, A045528, A045529. %Y A045516 Cf. A000142. %K A045516 nonn,base %O A045516 1,1 %A A045516 _Jeff Burch_ %E A045516 One more term (a(5)) from _Harvey P. Dale_, Nov 05 2015