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 A045518 #17 Jul 19 2020 02:35:24 %S A045518 6,6227020800,6402373705728000,620448401733239439360000, %T A045518 60415263063373835637355132068513997507264512000000000, %U A045518 608281864034267560872252163321295376887552831379210240000000000 %N A045518 Factorials with initial digit '6'. %C A045518 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 A045518 <a href="/index/Be#Benford">Index entries for sequences related to Benford's law</a> %F A045518 a(n) = A000142(A045525(n)). - _Amiram Eldar_, Jul 19 2020 %t A045518 Select[Range[50]!,IntegerDigits[#][[1]]==6&] (* _Harvey P. Dale_, Nov 14 2018 *) %Y A045518 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 A045518 nonn,base %O A045518 1,1 %A A045518 _Jeff Burch_