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A096214
First prime in primes of the form 10^n + 10^(n-k) - 1.
0
109, 1009, 10009, 1000099, 1000009999, 1000000999999, 10000000999, 1000000009, 1000000000999999999, 10000000000099, 100000000000099, 100000000000009999, 10000000000000099, 100000000000000099, 1000000000000000009
OFFSET
1,1
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
KEYWORD
nonn
AUTHOR
Cino Hilliard, Jul 28 2004
STATUS
approved