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 A160650 #7 Mar 11 2014 01:32:30 %S A160650 1,1,2,2,3,1,3,2,1,3,2,1,4,3,1,5,1,2,4,3,1,5,1,4,2,4,6,3,1,2,3,1,5,2, %T A160650 2,1,4,2,6,3,3,5,1,3,3,5,3,7,4,1,4,6,4,3,1,2,6,2,5,1,3,2,1,5,2,2,4,1, %U A160650 2,4,5,2,3,4,2,6,3,4,1,3,1,4,3,1,3,3,4,5,1,3,3,5,1,5,3,2,5,3,7,2,4,2,2,2,1 %N A160650 a(n) = A001222(A160649(n)) = A160649(n+1) - A160649(n); where A001222(m) is the sum of prime-factorization exponents of m (or, A001222(m) is the number of primes dividing m, counted with multiplicity). %Y A160650 Cf. A001222, A160649. %K A160650 nonn %O A160650 1,3 %A A160650 _Leroy Quet_, May 21 2009 %E A160650 Extended by _Ray Chandler_, Jun 16 2009