A175982 a(1) = 1, for n >= 2: a(n) = n^(a(n-1)) - 1.

1, 1, 2, 15, 30517578124

Offset

1,3

Comments

The next term is too large to include.

Links

Table of n, a(n) for n=1..5.

Example

For n = 4: a(4) = 4^2 - 1 = 15.

Crossrefs

Sequence in context: A175981 A056072 A294195 * A136666 A031361 A155955

Adjacent sequences: A175979 A175980 A175981 * A175983 A175984 A175985

Keyword

nonn

Author

Jaroslav Krizek, Nov 03 2010

Status

approved