OFFSET
1,2
COMMENTS
Prime a(n) are listed in A068146(n) = {3, 23, 229, 3121, 776887, 16774091, 275311670611, ...}.
MATHEMATICA
Take[Intersection[Flatten[Table[Abs[x^x-y^y], {x, 1, 12}, {y, 1, 12}]]], 50]
CROSSREFS
KEYWORD
nonn
AUTHOR
Alexander Adamchuk, Nov 24 2006
STATUS
approved