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 A076219 #12 Nov 20 2016 02:54:42 %S A076219 1,2,9,8,7,3,6,14,96,27,22,5,15,42,25,89,69,76,63,16,87,113,54,4,23, %T A076219 30,205,85,34,28,62,164,41,245,17,9,36,128,11,8,185,53,351,73,369,118, %U A076219 12,265,129,7,21,38,235,66,46,258,81,597,279,43,72,13,559,18,203,120,311 %N A076219 Smallest positive integer m such that m! begins with n in base 10. %e A076219 We have a(5) = 7 since 7! = 5040 and no smaller factorial number begins with 5 in base 10. %Y A076219 Apart from leading term, identical to A018799. %K A076219 nonn,base %O A076219 1,2 %A A076219 _Lekraj Beedassy_, Nov 04 2002 %E A076219 More terms from Lambert Klasen (lambert.klasen(AT)gmx.de), Jan 13 2005