

A187399


A puzzle called "The hidden prime".


1




OFFSET

1,1


COMMENTS

The first six terms are all emirps.  Arkadiusz Wesolowski, Mar 09 2011
Carlos Rivera asks for a 6digit number (prime?) that follows from the first six numbers. No solution has been posted after several years.  T. D. Noe, Mar 09 2011
The sequence is a cycle of emirps with the middle two digits of each term the same as the second and nexttolast digits of the subsequent term. The first six terms are as given, the seventh term is the unique sixdigit extension.  J. D. Lavelle, Jul 01 2018


LINKS

Table of n, a(n) for n=1..7.
Carlos Rivera, Puzzle 238, The Prime Puzzles & Problems Connection.


CROSSREFS

Cf. A006567.
Sequence in context: A070189 A178069 A167233 * A102335 A083405 A147749
Adjacent sequences: A187396 A187397 A187398 * A187400 A187401 A187402


KEYWORD

nonn,fini,full


AUTHOR

Arkadiusz Wesolowski, Mar 09 2011


EXTENSIONS

Puzzle solved and a(7) added by J. D. Lavelle, Jul 01 2018


STATUS

approved



