OFFSET
1,1
COMMENTS
Positions of negative terms in A256470.
Equally: Numbers n for which there are less primes in range [prime(n)*prime(n+1), prime(n+1)^2] than in range [prime(n)^2, prime(n)*prime(n+1)].
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..3084
MATHEMATICA
Select[Range@210, Count[Range[Prime[#]^2, Prime[#] Prime[# + 1]], _?PrimeQ] > Count[Range[Prime[#] Prime[# + 1], Prime[# + 1]^2], _?PrimeQ] &] (* Michael De Vlieger, Mar 30 2015 *)
PROG
(Scheme, with Antti Karttunen's IntSeq-library)
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Mar 30 2015
STATUS
approved