The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A068526 Numbers n such that prime(n+1)-prime(n) = tau(n) = A000005(n). 4
 1, 2, 3, 5, 6, 7, 8, 13, 14, 17, 18, 22, 24, 27, 32, 38, 41, 43, 65, 76, 80, 83, 85, 89, 93, 95, 109, 113, 122, 128, 134, 135, 143, 155, 159, 164, 173, 180, 183, 186, 188, 213, 226, 235, 237, 243, 245, 246, 247, 248, 249, 254, 275, 277, 284, 287, 292, 301, 303 (list; graph; refs; listen; history; text; internal format)
 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 Sequence in context: A028229 A104452 A062877 * A287339 A039086 A280060 Adjacent sequences:  A068523 A068524 A068525 * A068527 A068528 A068529 KEYWORD easy,nonn AUTHOR Benoit Cloitre, Mar 21 2002 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 21 13:55 EST 2020. Contains 331113 sequences. (Running on oeis4.)