A096214 First prime in primes of the form 10^n + 10^(n-k) - 1.

109, 1009, 10009, 1000099, 1000009999, 1000000999999, 10000000999, 1000000009, 1000000000999999999, 10000000000099, 100000000000099, 100000000000009999, 10000000000000099, 100000000000000099, 1000000000000000009

Offset

1,1

Links

Table of n, a(n) for n=1..15.

Prog

(PARI) f(n, z) = for(x=z, n, y=10^x+10^(x-z)-1; if(ispseudoprime(y), print1(y", ")))

Crossrefs

Sequence in context: A061699 A359144 A239720 * A173665 A059936 A262854

Adjacent sequences: A096211 A096212 A096213 * A096215 A096216 A096217

Keyword

nonn

Author

Cino Hilliard, Jul 28 2004

Status

approved