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A082718 Numbers k such that (83*10^(k-1) + 61)/9 is a depression prime. 2
3, 7, 13, 111, 3609, 37785 (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 - 929.
FORMULA
a(n) = A056265(n) + 2.
EXAMPLE
k=13 -> (83*10^(13-1) + 61)/9 = 9222222222229.
CROSSREFS
Sequence in context: A309775 A038691 A237890 * A221211 A322301 A154821
KEYWORD
nonn,base,more
AUTHOR
Patrick De Geest, Apr 13 2003
EXTENSIONS
37785 from Patrick De Geest, Jun 26 2005
Edited by Ray Chandler, Oct 20 2010
Edited by Ray Chandler, Nov 04 2014
STATUS
approved

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Last modified March 29 04:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)