A049234 Number of divisors of prime(n) + 2.

3, 2, 2, 3, 2, 4, 2, 4, 3, 2, 4, 4, 2, 6, 3, 4, 2, 6, 4, 2, 6, 5, 4, 4, 6, 2, 8, 2, 4, 4, 4, 4, 2, 4, 2, 6, 4, 8, 3, 6, 2, 4, 2, 8, 2, 4, 4, 9, 2, 8, 4, 2, 6, 4, 4, 4, 2, 8, 6, 2, 8, 4, 4, 2, 12, 4, 6, 4, 2, 8, 4, 3, 6, 8, 4, 8, 4, 8, 4, 4, 2, 6, 2, 8, 9, 4, 4, 8, 2, 8, 4, 4, 4, 4, 4, 4, 4, 2, 12, 4, 6, 4, 4

Offset

1,1

Links

Table of n, a(n) for n=1..103.

Example

10th term is a(10) = d(prime(10)+2) = d(29+2) = d(29) = 2 .

Mathematica

Table[DivisorSigma[0, Prime[n]+2], {n, 1, 103}]

Prog

(PARI) a(n) = numdiv(prime(n)+2); \\ Michel Marcus, Dec 15 2013

Crossrefs

Sequence in context: A270226 A305534 A248138 * A299351 A358935 A294299

Adjacent sequences: A049231 A049232 A049233 * A049235 A049236 A049237

Keyword

nonn

Author

Labos Elemer

Status

approved