This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A067356 Numbers n such that prime(n+3)-(n+3)*tau(n+3)=prime(n)-n*tau(n) where tau(n) is the number of divisors of n A000005(n). 0
 172, 206, 435, 542, 551, 575, 611, 626, 718, 759, 903, 955, 1102, 1238, 1495, 1711, 2009, 2379, 2385, 2482, 2572, 2815, 2874, 3018, 3103, 3222, 3225, 3802, 3899, 4055, 4335, 4342, 4430, 4439, 4545, 4682, 5154, 5183, 5467, 5594, 6036, 6058, 6202, 6231 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MATHEMATICA ptQ[n_]:=Module[{n3=n+3}, Prime[n3]-(n3)DivisorSigma[0, n3]==Prime[n]- n*DivisorSigma[ 0, n]]; Select[Range[6300], ptQ] (* Harvey P. Dale, Jul 22 2012 *) CROSSREFS Cf. A000005. Sequence in context: A223823 A224555 A146339 * A230371 A056132 A261706 Adjacent sequences:  A067353 A067354 A067355 * A067357 A067358 A067359 KEYWORD easy,nonn AUTHOR Benoit Cloitre, Feb 24 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 June 25 10:10 EDT 2019. Contains 324351 sequences. (Running on oeis4.)