

A072599


Numbers n such that (n!)^2  prime(n) is prime.


1



3, 4, 5, 6, 7, 16, 109, 116, 232, 877, 934
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OFFSET

1,1


COMMENTS

Values associated with 16, 109, 116 and 232 certified prime with Primo. These primes have lengths 27, 353, 382 and 900 digits, respectively.
a(10)a(11) associated with probable primes.  Robert Price, Aug 23 2014
a(12) > 15300.  Robert Price, Aug 23 2014


LINKS

Table of n, a(n) for n=1..11.


EXAMPLE

(5!)^2  prime(5) = 120^2  11 = 14400  11 = 14389 is prime, so 5 is a term.


PROG

(PARI) for(n=1, 800, if(isprime((n!)^2prime(n)), print1(n, ", ")))


CROSSREFS

Cf. A064769 (n such that (n!)^2 + p(n) is prime).
Sequence in context: A078305 A235324 A330373 * A095138 A026475 A101747
Adjacent sequences: A072596 A072597 A072598 * A072600 A072601 A072602


KEYWORD

nonn,more,hard


AUTHOR

Rick L. Shepherd, Jun 25 2002


EXTENSIONS

a(10)a(11) from Robert Price, Aug 23 2014


STATUS

approved



