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 A178799 #7 Sep 17 2014 12:49:59 %S A178799 1,2,2,2,4,4,8,6,2,4,12,12,4,8,24,24,8,16,36,12,18,6,24,16,32,72,24, %T A178799 36,12,48,32,64,144,48,72,24,36,60,64,56,72,108,36,144,96,144,48,72, %U A178799 120,128,112,144,6,210,72,288,192,288,96,144,240,256,224,288,12,420,144,216 %N A178799 Difference between consecutive least integers of each prime signature. %H A178799 Reinhard Zumkeller, <a href="/A178799/b178799.txt">Table of n, a(n) for n = 1..10000</a> %F A178799 a(n) = A025487(n+1) - A025487(n). %o A178799 (Haskell) %o A178799 a178799 n = a178799_list !! (n-1) %o A178799 a178799_list = zipWith (-) (tail a025487_list) a025487_list %o A178799 -- _Reinhard Zumkeller_, Sep 17 2014 %Y A178799 Cf. A025487 %K A178799 easy,nonn %O A178799 1,2 %A A178799 _Will Nicholes_, Jun 15 2010 %E A178799 Minor edits by _Ray Chandler_, Jul 31 2010