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A134985 Numbers n such that (n-1)^(n+1) - n^n is prime. 1
5, 6, 7, 13, 17, 171, 174, 378 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
No more terms up to 10000. - Rick L. Shepherd, May 16 2008
LINKS
Table of n, a(n) for n=1..8.
EXAMPLE
12^14 - 13^13 = 981043357956611, which is prime, so 13 is in the list.
MATHEMATICA
Select[Table[n, {n, 5, 400}], PrimeQ[(#-1)^(#+1)-#^#]&] (* Vladimir Joseph Stephan Orlovsky, Mar 03 2011*)
CROSSREFS
Sequence in context: A273929 A067531 A031029 * A371029 A111018 A326132
Adjacent sequences: A134982 A134983 A134984 * A134986 A134987 A134988
KEYWORD
hard,more,nonn
AUTHOR
Carl R. White, Feb 05 2008
STATUS
approved

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Last modified August 18 22:11 EDT 2024. Contains 375284 sequences. (Running on oeis4.)