A129810 - OEIS

A129810

9^(9^9) mod n.

0, 1, 0, 1, 4, 3, 1, 1, 0, 9, 5, 9, 1, 1, 9, 9, 9, 9, 1, 9, 15, 5, 8, 9, 14, 1, 0, 1, 9, 9, 4, 9, 27, 9, 29, 9, 1, 1, 27, 9, 9, 15, 11, 5, 9, 31, 34, 9, 15, 39, 9, 1, 9, 27, 49, 1, 39, 9, 28, 9, 34, 35, 36, 9, 14, 27, 22, 9, 54, 29, 12, 9, 72, 1, 39, 1, 71, 27, 21, 9, 0, 9, 61, 57, 9, 11, 9, 49, 42

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OFFSET

1,5

COMMENTS

Eventually constant: a(n) = 9^9^9 for all n > 9^9^9 ~ 4.28*10^369693099. - M. F. Hasler, Feb 24 2018

LINKS

Table of n, a(n) for n=1..89.

Math Forum, Dr. Math 9^387420489, [09/10/1997]

Math Forum, Dr. Math Digits of 9^9^9, 06/11/2003

Index entries for eventually constant sequences.

FORMULA

a(n) = 0 for all n = 3^k, 0 <= k <= 2*9^9; a(n) = 9^9^9 for all n > 9^9^9. - M. F. Hasler, Feb 24 2018