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A082716 Numbers k such that (72*10^(k-1) - 27)/9 is a plateau prime. 1
3, 5, 29, 157, 323, 353, 1213, 1285, 7985, 15193, 84773, 119931, 148861 (list; graph; refs; listen; history; text; internal format)
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, 1996-97, pp. 1-9.
LINKS
Patrick De Geest, PDP Reference Table - 797.
FORMULA
a(n) = A056263(n) + 2.
EXAMPLE
k=5 -> (72*10^(5-1) - 27)/9 = 79997.
CROSSREFS
Sequence in context: A215663 A092330 A176951 * A352295 A283266 A060255
KEYWORD
nonn,base,more
AUTHOR
Patrick De Geest, Apr 13 2003
EXTENSIONS
a(11)=84773 from Ray Chandler, Jan 03 2011
a(12)=119931 from Ray Chandler, Apr 01 2011
a(13)=148861 from Ray Chandler, Apr 09 2011
Edited by Ray Chandler, Nov 04 2014
STATUS
approved

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Last modified March 28 07:20 EDT 2024. Contains 371235 sequences. (Running on oeis4.)