OFFSET
1,4
COMMENTS
For a guide to related sequences, see A204892.
EXAMPLE
1 divides 2^2-1^1 -> k=2, j=1
2 divides 3^3-1^1 -> k=3, j=1
3 divides 2^2-1^1 -> k=2, j=1
4 divides 4^4-2^2 -> k=2, j=2
MATHEMATICA
s = Table[n^n, {n, 1, 120}];
lk = Table[NestWhile[# + 1 &, 1,
Min[Table[Mod[s[[#]] - s[[j]], z], {j, 1, # - 1}]] =!= 0 &], {z, 1, Length[s]}]
Table[NestWhile[# + 1 &, 1,
Mod[s[[lk[[j]]]] - s[[#]], j] =!= 0 &],
{j, 1, Length[lk]}]
(* Peter J. C. Moses, Jan 27 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jan 31 2012
STATUS
approved