%I #17 Jul 19 2020 02:35:24
%S 6,6227020800,6402373705728000,620448401733239439360000,
%T 60415263063373835637355132068513997507264512000000000,
%U 608281864034267560872252163321295376887552831379210240000000000
%N Factorials with initial digit '6'.
%C Benford's law shows that this sequence will contain about (log 7 - log 6)/log 10 =~ 7% 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(A045525(n)). - _Amiram Eldar_, Jul 19 2020
%t Select[Range[50]!,IntegerDigits[#][[1]]==6&] (* _Harvey P. Dale_, Nov 14 2018 *)
%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_