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 A096210 Primes of the form 10^n + 10^(n-2) - 1. 1
 1009, 10099, 100999, 1009999999, 100999999999, 100999999999999999999999, 100999999999999999999999999999999999999, 100999999999999999999999999999999999999999 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..11 MATHEMATICA t={}; Do[m=n; p=10^n+10^(n-2)-1; If[PrimeQ[p], AppendTo[t, p]], {n, 300}]; t (* Vincenzo Librandi, Jul 17 2012 *) Select[Table[10^n+10^(n-2)-1, {n, 50}], PrimeQ] (* Harvey P. Dale, Apr 13 2019 *) 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: A308793 A180088 A117359 * A133584 A139059 A123156 Adjacent sequences:  A096207 A096208 A096209 * A096211 A096212 A096213 KEYWORD nonn AUTHOR Cino Hilliard, Jul 28 2004 STATUS approved

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Last modified June 20 12:04 EDT 2021. Contains 345164 sequences. (Running on oeis4.)