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A244271 Primes p such that p1p2p3p4p5p6p7p8p9p is prime. 0
17, 53, 181, 313, 829, 859, 1151, 1493, 2011, 2161, 2267, 2287, 2371, 2521, 2549, 2791, 2803, 3019, 3617, 3821, 4273, 4481, 4483, 4493, 5081, 5351, 5399, 5669, 5851, 6067, 6197, 6529, 6781, 6833, 8123, 8329, 8527, 8597, 9277, 10631, 10771, 11119, 11801, 11807, 11941, 12149, 12239, 12421, 12479, 12743, 13033 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..51.

EXAMPLE

53 is prime and 53153253353453553653753853953 is prime. Thus 53 is a member of this sequence.

PROG

(PARI) for(n=1, 10^4, b=""; for(i=2, 20, if(i==Mod(1, 2), b=concat(b, Str((i-1)/2))); if(i==Mod(0, 2), b=concat(b, Str(prime(n))))); if(ispseudoprime(eval(b)), print1(prime(n), ", ")))

CROSSREFS

Cf. A244270.

Sequence in context: A082078 A107175 A244270 * A224269 A125637 A147255

Adjacent sequences:  A244268 A244269 A244270 * A244272 A244273 A244274

KEYWORD

nonn,base,less

AUTHOR

Derek Orr, Jun 24 2014

STATUS

approved

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Last modified April 25 00:46 EDT 2017. Contains 285346 sequences.