2,7

a(1969) is undefined, but otherwise a(n) is defined for all n >= 2 and < 4000000.

Table of n, a(n) for n=2..74.

J. Froemke and J. W. Grossman, A mod-n Ackermann function, or what's so special about 1969?, Amer. Math. Monthly, 100 (1993), 180-183.

J. W. Grossman, Home page

Sequence in context: A338945 A263007 A104714 * A010128 A348993 A180133

Adjacent sequences: A085116 A085117 A085118 * A085120 A085121 A085122

nonn

Jerrold Grossman, Apr 25 2004

approved