A177503 Primes of the form (44*10^n+1)/9.

5, 4889, 48889, 4888889, 48888888889, 4888888888889, 4888888888888888889, 48888888888888888888888888888888888888889, 4888888888888888888888888888888888888888888888889

Offset

1,1

Comments

The next term (a(10)) has 97 digits. - Harvey P. Dale, Sep 13 2018

Links

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

Mathematica

Join[{5}, Select[Table[10*FromDigits[PadRight[{4}, n, 8]]+9, {n, 50}], PrimeQ]] (* Harvey P. Dale, Sep 13 2018 *)

Prog

(Magma) [a: n in [0..250]|IsPrime(a) where a is (44*10^n+1)div(9)]

Crossrefs

Cf. A103000.

Sequence in context: A276238 A357125 A086896 * A072021 A196627 A013535

Adjacent sequences: A177500 A177501 A177502 * A177504 A177505 A177506

Keyword

nonn

Author

Vincenzo Librandi, Dec 11 2010

Status

approved