A065151 a(n) = prime(1 + A064722(n)).

2, 2, 3, 2, 3, 2, 3, 5, 7, 2, 3, 2, 3, 5, 7, 2, 3, 2, 3, 5, 7, 2, 3, 5, 7, 11, 13, 2, 3, 2, 3, 5, 7, 11, 13, 2, 3, 5, 7, 2, 3, 2, 3, 5, 7, 2, 3, 5, 7, 11, 13, 2, 3, 5, 7, 11, 13, 2, 3, 2, 3, 5, 7, 11, 13, 2, 3, 5, 7, 2, 3, 2, 3, 5, 7, 11, 13, 2, 3, 5, 7, 2, 3, 5, 7, 11, 13, 2, 3, 5, 7, 11, 13, 17

Offset

2,1

Links

Harry J. Smith, Table of n, a(n) for n = 2..1000

Formula

a(n) = prime(PrimePi(prime(n)) - prime(PrimePi(n)) + 1) = A000040(A000720(A000040(n)) - A000040(A000720(n)) + 1).

Prog

(PARI) { for (n = 2, 1000, a=prime(n - precprime(n) + 1); write("b065151.txt", n, " ", a) ) } \\ Harry J. Smith, Oct 13 2009

Crossrefs

Cf. A000040, A000720, A064722.

Sequence in context: A248147 A087458 A052180 * A345874 A338720 A320013

Adjacent sequences: A065148 A065149 A065150 * A065152 A065153 A065154

Keyword

nonn

Author

Labos Elemer, Oct 19 2001

Status

approved