%I #12 Mar 31 2015 00:28:29
%S 1,2,3,4,5,6,7,8,9,10,11,12,14,15,16,17,18,19,20,21,22,23,24,27,28,29,
%T 30,31,32,33,34,35,36,37,40,46,47,51,52,53,54,56,57,60,62,64,66,67,68,
%U 70,71,72,75,76,78,79,80,82,83,84,85,87,89,90,91,93,94,95,97,99,100
%N Numbers n for which there are at least as many primes in the range [prime(n)*prime(n+1), prime(n+1)^2] as in the range [prime(n)^2, prime(n)*prime(n+1)].
%C Positions of nonnegative terms in A256470.
%H Antti Karttunen, <a href="/A256474/b256474.txt">Table of n, a(n) for n = 1..3457</a>
%t Select[Range@100, Count[Range[Prime[#] Prime[# + 1], Prime[# + 1]^2], _?PrimeQ] >= Count[Range[Prime[#]^2, Prime[#] Prime[# + 1]], _?PrimeQ] &] (* _Michael De Vlieger_, Mar 30 2015 *)
%o (Scheme, with _Antti Karttunen_'s IntSeq-library)
%o (define A256474 (MATCHING-POS 1 1 (lambda (n) (<= 0 (A256470 n)))))
%Y Complement: A256475.
%Y Union of A256471 and A256476.
%Y Cf. A256484 (corresponding primes).
%Y Cf. A256470.
%K nonn
%O 1,2
%A _Antti Karttunen_, Mar 30 2015