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 A055718 #6 Sep 01 2015 13:31:12 %S A055718 0,1,1,1,2,1,2,2,2,1,2,2,3,2,2,2,3,3,4,4,4,3,4,4,4,3,3,3,4,4,5,5,5,4, %T A055718 4,4,5,4,4,4,5,5,6,6,6,5,6,6,6,6,6,6,7,7,7,7,7,6,7,7,8,7,7,7,7,7,8,8, %U A055718 8,8,9,9,10,9,9,9,9,9,10,10,10,9,10,10,10,9,9,9,10,10,10,10,10,9,9,9,10,10 %N A055718 Erroneous version of A056171. %C A055718 The old definition was "Number of distinct prime factors of EulerPhi(n!) minus number of primes dividing n!". This comes nowhere nearing producing the given terms, which apart from a(3) are the same as those of A056171. %K A055718 dead %O A055718 1,5