0,1

Table of n, a(n) for n=0..33.

Wikipedia, Graham's number

a(2) = 11 because 3^3^3^... + 2 = 0 (mod 11).

Cf. A152178.

Sequence in context: A248242 A215598 A322603 * A110326 A112061 A238398

Adjacent sequences: A152174 A152175 A152176 * A152178 A152179 A152180

nonn,more

Karl W. Heuer, Nov 28 2008

approved