A177504 Primes of the form 5*10^n-9.

41, 491, 49991, 49999991, 4999999999999999999999991

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..9

Mathematica

Select[Table[5 10^n - 9, {n, 250}], PrimeQ] (* Vincenzo Librandi, Jan 03 2014 *)

Prog

(Magma)[a: n in [0..250] | IsPrime(a) where a is 5*10^n-9];

Crossrefs

Cf. A086949, A103001.

Sequence in context: A098958 A269073 A086949 * A297976 A208048 A298839

Adjacent sequences: A177501 A177502 A177503 * A177505 A177506 A177507

Keyword

nonn

Author

Vincenzo Librandi, Dec 11 2010

Status

approved