%I #4 Mar 30 2012 18:50:53
%S 0,1,2,2,2,3,4,4,4,5,5,6,6,7,7,8,8,9,10,11,11,11,11,12,12,13,13,14,14,
%T 15,16,17,17,17,17,18,18,19,19,20,20,21,22,23,23,23,23,24,24,25,26,27,
%U 28,29,29,29,29,29,29,30,30,31,31,32,32,33,34,35,36,37,37,37,37,37,37
%N Number of preceding primes or nonprimes whichever is greater.
%C a(1) = 0, a(n) = if 2*m+1 > n then m else n-m-1, where m = number of occurrences of primes in a(k) for k<n;
%C for k>1: prime(k) occurs consecutively exactly A001223(k)=prime(k)-prime(k-1) times; the nonnegative integers (A001477) are a subsequence.
%K nonn
%O 1,3
%A _Reinhard Zumkeller_, Jan 12 2006