A177490 Primes of the form (41*10^n-23)/9.

2, 43, 45553, 45555553, 45555555555555555553, 45555555555555555555555555555555553, 4555555555555555555555555555555555555555555555555555553

Offset

1,1

Links

Table of n, a(n) for n=1..7.

Mathematica

Select[(41 10^Range[0, 60]-23)/9, PrimeQ] (* Harvey P. Dale, Dec 12 2020 *)

Prog

(Magma) [a: n in [0..250] | IsPrime(a) where a is (41*10^n-23)div(9)]

Crossrefs

Cf. A102991.

Sequence in context: A088466 A357279 A362762 * A203498 A156478 A156508

Adjacent sequences: A177487 A177488 A177489 * A177491 A177492 A177493

Keyword

nonn

Author

Vincenzo Librandi, Dec 11 2010

Status

approved