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A309566

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

307, 130307, 309370307, 30281172370306703

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OFFSET

1,1

LINKS

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).

KEYWORD

nonn,base,fini,full

AUTHOR

EXTENSIONS

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

STATUS

approved