

A309566


a(n) is the least prime that can be written as a sequence of primes separated by n single zeros, and where every 0splitting is prime.


1




OFFSET

1,1


LINKS

Table of n, a(n) for n=1..4.
Carlos Rivera, Puzzle 970. A309566


EXAMPLE

a(1) = 307 = A309101(1).
130307 is a term since 3, 7, 13, 307, 1303, 130307 are all prime.


CROSSREFS

Subsequence of A309101.
Cf. A000040 (primes), A038618 (zeroless primes), A056709 (primes with zeros).
Sequence in context: A176091 A118284 A234030 * A118843 A224675 A249552
Adjacent sequences: A309563 A309564 A309565 * A309567 A309568 A309569


KEYWORD

nonn,base,fini,full


AUTHOR

Michel Marcus, Aug 08 2019


EXTENSIONS

a(4) from Daniel Suteu and Giovanni Resta, Aug 09 2019


STATUS

approved



