This site is supported by donations to The OEIS Foundation.

 Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS". Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A208178 Primes of the form 256*k + 1. 9
 257, 769, 3329, 7681, 7937, 9473, 10753, 11777, 12289, 13313, 14081, 14593, 15361, 17921, 18433, 19457, 22273, 23041, 23297, 25601, 26113, 26881, 30977, 31489, 32257, 36097, 36353, 37633, 37889, 39937, 40193, 40961, 41729, 43777, 45569, 46337, 49409, 49921 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Odd primes p such that -1 is a 128th power mod p. - Eric M. Schmidt, Mar 27 2014 LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 MATHEMATICA Select[256 Range[195] + 1, PrimeQ] PROG (PARI) for(n=1, 195, r=256*n+1; if(isprime(r), print1(r", "))); (MAGMA) [ p: p in PrimesUpTo(50000) | p mod 256 eq 1 ]; (Haskell) a208178 n = a208178_list !! (n-1) a208178_list = filter ((== 1) . a010051) [1, 257..] -- Reinhard Zumkeller, Mar 06 2012 CROSSREFS Cf. A065091, A002144, A007519, A094407, A133870, A142925, A208177, A076339. Sequence in context: A208177 A229855 A229856 * A105131 A202372 A036549 Adjacent sequences:  A208175 A208176 A208177 * A208179 A208180 A208181 KEYWORD nonn,easy AUTHOR Bruno Berselli, Feb 25 2012 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.