This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A127845 Numbers k such that k^2 + 5 and k^2 + 7 are twin primes. 1
 0, 6, 12, 36, 48, 78, 114, 162, 258, 414, 666, 792, 804, 996, 1044, 1206, 1308, 1314, 1356, 1548, 1584, 1632, 1734, 1902, 2106, 2196, 2214, 2346, 2358, 2592, 2634, 2766, 2808, 2868, 2892, 2988, 3072, 3246, 3432, 3516, 3576, 3774, 3894, 3912, 3996, 4038 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS All terms are multiples of 6. Intersection of A114270 and A078402. LINKS Robert Israel, Table of n, a(n) for n = 1..7640 MAPLE filter:= n -> isprime(n^2+5) and isprime(n^2+7): N:= 10000: # to get all entries <= 6*N A127845:= select(filter, [6*n \$ n=0..N]); # Robert Israel, Apr 17 2014 PROG (MAGMA) [n: n in [0..500] | IsPrime(n^2+5) and IsPrime(n^2+7)] // Vincenzo Librandi, Nov 23 2010 CROSSREFS Cf. A078402, A114270. Sequence in context: A166636 A167338 A078402 * A096932 A212976 A176681 Adjacent sequences:  A127842 A127843 A127844 * A127846 A127847 A127848 KEYWORD nonn AUTHOR Zak Seidov, Apr 05 2007 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 March 20 04:10 EDT 2018. Contains 300953 sequences. (Running on oeis4.)