A085119 a(n) = number at which the Ackermann function mod n stabilizes.

1, 1, 1, 1, 1, 1, 5, 2, 1, 1, 1, 9, 13, 13, 13, 13, 13, 2, 13, 13, 17, 13, 13, 5, 13, 13, 13, 22, 13, 5, 29, 1, 13, 13, 13, 29, 13, 13, 13, 7, 13, 1, 17, 13, 29, 1, 13, 1, 33, 49, 13, 20, 31, 11, 13, 11, 3, 19, 13, 19, 61, 13, 61, 13, 61, 27, 49, 10, 13, 40, 13, 34, 37

Offset

2,7

Comments

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

Links

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

Crossrefs

Sequence in context: A338945 A263007 A104714 * A010128 A348993 A180133

Adjacent sequences: A085116 A085117 A085118 * A085120 A085121 A085122

Keyword

nonn

Author

Jerrold Grossman, Apr 25 2004

Status

approved