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%I #17 Jul 19 2020 02:35:34
%S 5040,51090942171709440000,
%T 523022617466601111760007224100074291200000000,
%U 5502622159812088949850305428800254892961651752960000000000
%N Factorials with initial digit '5'.
%C Benford's law shows that this sequence will contain about (log 6 - log 5)/log 10 =~ 8% of factorials. [_Charles R Greathouse IV_, Nov 13 2010]
%H <a href="/index/Be#Benford">Index entries for sequences related to Benford's law</a>
%F a(n) = A000142(A045524(n)). - _Amiram Eldar_, Jul 19 2020
%t Select[Range[100]!,First[IntegerDigits[#]]==5&] (* _Harvey P. Dale_, Sep 06 2016 *)
%Y 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. See also A000142.
%K nonn,base
%O 1,1
%A _Jeff Burch_
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