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A101234 Numbers n such that 7^n+5^n-1 is prime. 0
1, 2, 3, 9, 13, 25, 26, 63, 73, 435, 2245, 2907, 3089, 5615 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Terms beyond 435 are (BSW-)pseudoprimes. - Joerg Arndt, Jan 25 2011

LINKS

Table of n, a(n) for n=1..14.

PROG

(MAGMA) [n: n in [0..400]|IsPrime(7^n+5^n-1)]

(PARI) for(n=1, 10000, if(isprime(7^n+5^n-1), print1(n, ", ")))  /* Joerg Arndt, Jan 25 2011 */

CROSSREFS

Sequence in context: A032486 A123859 A048744 * A233190 A269154 A225792

Adjacent sequences:  A101231 A101232 A101233 * A101235 A101236 A101237

KEYWORD

nonn,more

AUTHOR

Vincenzo Librandi, Jan 22 2011

EXTENSIONS

a(11)-a(13) from Joerg Arndt, Jan 25 2011

a(14) from Vincenzo Librandi, Jul 28 2020

STATUS

approved

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Last modified May 17 16:09 EDT 2022. Contains 353747 sequences. (Running on oeis4.)