|
Search: id:A096209
|
|
|
| A096209 |
|
Primes of the form 10 followed by n 9's. |
|
+0
3
|
|
| 109, 10999999999, 1099999999999, 1099999999999999999, 109999999999999999999999, 1099999999999999999999999999999, 10999999999999999999999999999999999999
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Or, primes of the form 10^n + 10^(n-1) - 1.
|
|
MATHEMATICA
|
t = {}; Do[m = n; p = 10^(n + 1) + (10^n - 1); If[PrimeQ[p], AppendTo[t, p]], {n, 165}]; t (* Robert G. Wilson v *)
|
|
PROGRAM
|
(PARI) f(n, z) = for(x=z, n, y=10^x+10^(x-z)-1; if(ispseudoprime(y), print1(y", ")))
|
|
CROSSREFS
|
Cf. A113628, A113629, A113630, A111391.
Sequence in context: A059936 A061724 A125044 this_sequence A087303 A045884 A110736
Adjacent sequences: A096206 A096207 A096208 this_sequence A096210 A096211 A096212
|
|
KEYWORD
|
base,nonn
|
|
AUTHOR
|
Cino Hilliard (hillcino368(AT)gmail.com), Jul 28 2004
|
|
EXTENSIONS
|
Entry revised by njas, Apr 01 2006
|
|
|
Search completed in 0.002 seconds
|
