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A057462 Numbers n such that 10*11^n + 1 is prime. 2
0, 10, 24, 864, 2440, 9438, 68272, 148602 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(9) > 2*10^5. - Robert Price, Jan 19 2015

LINKS

Table of n, a(n) for n=1..8.

MATHEMATICA

Do[ If[ PrimeQ[ 10*11^n + 1 ], Print[ n ] ], {n, 0, 1000} ]

Select[Range[0, 4000], PrimeQ[(10*11^# + 1)] &] (* Vincenzo Librandi, Sep 28 2012 *)

PROG

(PARI) is(n)=ispseudoprime(10*11^n+1) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Sequence in context: A103071 A264296 A265150 * A180043 A251317 A251201

Adjacent sequences:  A057459 A057460 A057461 * A057463 A057464 A057465

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Sep 08 2000

EXTENSIONS

a(5) from Vincenzo Librandi, Sep 28 2012

a(6)-a(8) from Robert Price, Jan 19 2015

STATUS

approved

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Last modified August 21 06:54 EDT 2019. Contains 326162 sequences. (Running on oeis4.)