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A112406
a(n) = (n+1)^((n+1)^n) - n^(n^(n-1)).
0
1, 3, 19679, 340282366920938463463374607431768191773
OFFSET
1,2
COMMENTS
First differences of A053015. Since a(2) = 3 is prime, a(3) = 19679 is semiprime and a(4) has 6 prime factors. - Jonathan Vos Post, Dec 11 2005
FORMULA
Equally, 1-0, (2^2)-1, (3^3)^3 - 2^2, ((4^4)^4)^4 - (3^3)^3, ...
CROSSREFS
Cf. A053015.
Sequence in context: A182914 A203182 A128121 * A344681 A376027 A171364
KEYWORD
nonn
AUTHOR
Daniel Kiteck, Dec 07 2005
STATUS
approved