|
|
A251862
|
|
Numbers n such that n + 3 divides n^n - 3.
|
|
3
|
|
|
3, 7, 10, 27, 727, 1587, 9838, 758206, 789223, 1018846, 1588126, 1595287, 2387206, 4263586, 9494746, 12697378, 17379860, 21480726, 25439767, 38541526, 44219926, 55561536, 62072326, 64335356, 70032586, 83142466, 85409276
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
3 is in this sequence because 3 + 3 = 6 divides 3^3 - 3 = 24.
|
|
MAPLE
|
select(t ->((-3) &^ (t) - 3) mod (t+3) = 0, [$1..10^6]); # Robert Israel, Dec 14 2014
|
|
MATHEMATICA
|
|
|
PROG
|
(Magma) [n: n in [2..10000] | Denominator((n^n-3)/(n+3)) eq 1];
(PARI) isok(n) = Mod(n, n+3)^n == 3; \\ Michel Marcus, Dec 10 2014
(Sage)
[n for n in range(10^4) if (n + 3).divides((-3)^n - 3)] # Peter Luschny, Jan 17 2015
(Python)
A251862_list = [n for n in range(10**6) if pow(-3, n, n+3) == 3] # Chai Wah Wu, Jan 19 2015
|
|
CROSSREFS
|
Cf. ...............Numbers n such that x divides y, where:
...x.....y......k=0.......k=1.......k=2........k=3........
(For x=n-1 and y=n^n+1, the only terms are 0, 2 and 3. - David L. Harden, Jan 14 2015)
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|