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A261408 Numbers k such that A260864(k) is a prime or probable prime, where A260864(k) is the number whose base-14 representation is the concatenation of the base-14 representations of (1, ..., k, k-1, ..., 1). 2
21, 34, 192, 310, 373, 536, 12000 (list; graph; refs; listen; history; text; internal format)
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
CROSSREFS
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
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Aug 22 2015
EXTENSIONS
More explicit title from M. F. Hasler, Aug 23 2015
STATUS
approved

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Last modified June 3 10:54 EDT 2023. Contains 363110 sequences. (Running on oeis4.)