OFFSET
1,2
LINKS
R. J. Mathar, Table of n, a(n) for n = 1..10159
EXAMPLE
1 has 1 divisor, prime(1) is 2, and 2+1=3 is prime(1+1), so 1 is in the sequence.
2 has 2 divisors, prime(2) is 3, and 3+2=5 is prime(2+1), so 2 is in the sequence.
MAPLE
with(numtheory): A068526:=n->`if`(ithprime(n+1)-ithprime(n)=tau(n), n, NULL): seq(A068526(n), n=1..500); # Wesley Ivan Hurt, Apr 10 2015
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, Mar 21 2002
STATUS
approved