This site is supported by donations to The OEIS Foundation.

"Email this user" was broken Aug 14 to 9am Aug 16. If you sent someone a message in this period, please send it again.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A112681 Primes such that the sum of the predecessor and successor primes is divisible by 3. 15
 23, 29, 31, 37, 47, 59, 61, 67, 73, 79, 83, 89, 131, 137, 151, 163, 167, 179, 199, 223, 233, 239, 251, 269, 271, 277, 331, 337, 353, 359, 367, 379, 383, 389, 433, 439, 443, 449, 467, 479, 503, 521, 523, 547, 557, 569, 571, 577, 587, 599, 601, 613, 619, 631 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE 23 is in the sequence because 19+29=48 and 3|48. 29 is in the sequence because 29+31=60 and 3|60. MATHEMATICA Prime@Select[Range[2, 117], Mod[Prime[ # - 1] + Prime[ # + 1], 3] == 0 &] (* Robert G. Wilson v, Jan 11 2006 *) CROSSREFS Analogs where 3 is replaced by other primes: Divisor: ..3 .......5 .......7 ......11 ......13 ......17 ......19 ......23 ......29 ......31 ......37 ......41 ......43 Cf. A112681, A112794, A112731, A112789, A112795, A112796, A112804, A112847, A112859, A113155, A113156, A113157, A113158. Sequence in context: A166063 A231073 A049483 * A078500 A155913 A227919 Adjacent sequences:  A112678 A112679 A112680 * A112682 A112683 A112684 KEYWORD easy,nonn AUTHOR Carlos Alves, Dec 30 2005 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 17 07:59 EDT 2017. Contains 290635 sequences.