The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A108119 Numbers k such that prime(k) and prime(k+1) are congruent to 1 (mod 10). 0
 42, 53, 82, 115, 125, 141, 172, 177, 193, 233, 279, 369, 399, 431, 474, 500, 575, 580, 585, 650, 651, 672, 708, 737, 751, 760, 795, 798, 820, 841, 842, 863, 873, 933, 1019, 1031, 1099, 1112, 1166, 1178, 1225, 1245, 1266, 1312, 1352, 1436, 1463, 1479, 1505 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE Prime(42)=181, prime(43)=191. This is the first pair of successive primes both ending with 1. MATHEMATICA ra=Range[2000]; cnd=Mod[Prime[ # ], 10]==Mod[Prime[ #+1], 10]==1&; se=Select[ra, cnd] CROSSREFS Sequence in context: A186456 A181647 A105346 * A175103 A116262 A156394 Adjacent sequences: A108116 A108117 A108118 * A108120 A108121 A108122 KEYWORD nonn AUTHOR Zak Seidov, Jun 04 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified March 23 16:16 EDT 2023. Contains 361445 sequences. (Running on oeis4.)