

A261408


Numbers k such that A260864(k) is a prime or probable prime, where A260864(k) is the number whose base14 representation is the concatenation of the base14 representations of (1, ..., k, k1, ..., 1).


2




OFFSET

1,1


COMMENTS

The subsequence of those A261171(n) for which A261172(n) = 14.  M. F. Hasler, Aug 23 2015


REFERENCES

David Broadhurst, email to N. J. A. Sloane, Aug 23 2015


LINKS

Table of n, a(n) for n=1..7.


CROSSREFS

Cf. A260343, A260864.
See also A260871 which lists all primes of the form A[b](k), and A261171 and A261172 which list the k and b values of these primes.  M. F. Hasler, Aug 23 2015
Sequence in context: A053409 A253910 A144205 * A008946 A095738 A216467
Adjacent sequences: A261405 A261406 A261407 * A261409 A261410 A261411


KEYWORD

nonn,more


AUTHOR

N. J. A. Sloane, Aug 22 2015


EXTENSIONS

More explicit title from M. F. Hasler, Aug 23 2015


STATUS

approved



