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 A136768 #5 Aug 03 2013 03:56:08 %S A136768 7,15,23,31,39,47,55,56,64,72,80,88,96,104,112,113,121,129,137,145, %T A136768 153,161,169,170,178,186,194,202,210,218,226,227,235,243,251,259,267, %U A136768 275,283,284,292,300,308,316,324,332,340,341,349,357,365,373,381,389,397 %N A136768 n! never ends in this many 0's in base 7. %C A136768 Also: n! never ends in this many 0's in base 14, 21, 28 and all other 7-divisible proper factors of 7! %Y A136768 Cf. A000142, A136758, A136694. %Y A136768 Cf. A000966, A055938, A096346, A136767, A136769, A136770, A136771, A136772, A136773, A136774. %K A136768 base,nonn %O A136768 1,1 %A A136768 _Carl R. White_, Jan 21 2008