

A082706


Numbers k such that (31*10^(k1)  13)/9 is a plateau prime.


1




OFFSET

1,1


COMMENTS

Prime versus probable prime status and proofs are given in the author's table.


REFERENCES

C. Caldwell and H. Dubner, "Journal of Recreational Mathematics", Volume 28, No. 1, 199697, pp. 19.


LINKS

Table of n, a(n) for n=1..5.
Patrick De Geest, PDP Reference Table  343.
Makoto Kamada, Prime numbers of the form 344...443.
Index entries for primes involving repunits.


FORMULA

a(n) = A056253(n) + 2.


EXAMPLE

k=13 > (31*10^(131)  13)/9 = 3444444444443.


CROSSREFS

Cf. A082697A082720, A056253.
Sequence in context: A064119 A224984 A228030 * A201181 A130594 A227173
Adjacent sequences: A082703 A082704 A082705 * A082707 A082708 A082709


KEYWORD

nonn,base,hard,more


AUTHOR

Patrick De Geest, Apr 13 2003


EXTENSIONS

More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008
Edited by Ray Chandler, Nov 05 2014


STATUS

approved



