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A215238
Prime(A215237).
4
2, 3, 113, 1637, 2971, 44293, 305663, 1133071, 370261, 1357201, 46006769, 268119517, 291057379, 3429782117, 10502593103, 10926444583, 87241770619, 226751019497, 1901687257447
OFFSET
0,1
COMMENTS
We use offset 0 because A215237 uses that offset.
a(n) is least prime(k) such that there are exactly n primes between prime(k)/2 and prime(k+1)/2. - Peter Munn, Oct 22 2017
FORMULA
a(n) = A000040(A215237(n)).
MATHEMATICA
t = Table[PrimePi[Prime[n + 1]/2] - PrimePi[Prime[n]/2], {n, 100000}]; t2 = Flatten[Table[Position[t, n, 1, 1], {n, 0, 8}]]; Prime[t2]
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
T. D. Noe, Oct 11 2012
EXTENSIONS
a(14)-a(18) from Donovan Johnson, Oct 13 2012
STATUS
approved