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A008335 Number of primes dividing p+1 as p runs through the primes. 2
1, 1, 2, 1, 2, 2, 2, 2, 2, 3, 1, 2, 3, 2, 2, 2, 3, 2, 2, 2, 2, 2, 3, 3, 2, 3, 2, 2, 3, 3, 1, 3, 3, 3, 3, 2, 2, 2, 3, 3, 3, 3, 2, 2, 3, 2, 2, 2, 3, 3, 3, 3, 2, 3, 3, 3, 3, 2, 2, 3, 2, 3, 3, 3, 2, 3, 2, 2, 3, 3, 3, 3, 2, 3, 3, 2, 4, 2, 3, 3, 4, 2, 2, 3, 3, 3, 3, 2, 4, 2, 3, 3, 2, 3, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

T. D. Noe, Table of n, a(n) for n=1..10000

MAPLE

for i from 1 to 500 do if isprime(i) then print(nops(factorset(i+1))); fi; od;

CROSSREFS

Sequence in context: A068212 A064131 A105194 * A106031 A055175 A243866

Adjacent sequences:  A008332 A008333 A008334 * A008336 A008337 A008338

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified November 26 11:14 EST 2014. Contains 250056 sequences.