This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A023313 Numbers n such that n remains prime through 4 iterations of function f(x) = 5x + 2. 0
 373, 1171, 13687, 21997, 25657, 61603, 74413, 76471, 84199, 87181, 93487, 114691, 135859, 170761, 174877, 184333, 192979, 196177, 207931, 209743, 244219, 276229, 286687, 292561, 297811, 334603, 338893, 405037, 408361, 417097, 439141, 446323 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS n, 5*n+2, 25*n+12, 125*n+62 and 625*n+312 are primes. [From Vincenzo Librandi, Aug 04 2010] LINKS PROG (MAGMA) [n: n in [1..1000000] | IsPrime(n) and IsPrime(5*n+2) and IsPrime(25*n+12) and IsPrime(125*n+62) and IsPrime(625*n+312)] [From Vincenzo Librandi, Aug 04 2010] CROSSREFS Sequence in context: A182573 A142921 A133559 * A213301 A213300 A219444 Adjacent sequences:  A023310 A023311 A023312 * A023314 A023315 A023316 KEYWORD nonn AUTHOR STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .