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A175982
a(1) = 1, for n >= 2: a(n) = n^(a(n-1)) - 1.
0
1, 1, 2, 15, 30517578124
OFFSET
1,3
COMMENTS
The next term is too large to include.
EXAMPLE
For n = 4: a(4) = 4^2 - 1 = 15.
CROSSREFS
Sequence in context: A175981 A056072 A294195 * A136666 A031361 A155955
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Nov 03 2010
STATUS
approved