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A129810 [9^(9^9)] mod n. 0
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 (list; graph; refs; listen; history; internal format)
OFFSET

1,5

LINKS

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

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

EXAMPLE

[9^(9^9)] mod 1 =0

[9^(9^9)] mod 2 =1

[9^(9^9)] mod 9 =0

[9^(9^9)] mod (3*387420489) =0

MATHEMATICA

Table[PowerMod[9, 9^9, n], {n, 1, 100}]

CROSSREFS

Cf. A081230.

Sequence in context: A117026 A083904 A195596 * A016500 A157464 A046546

Adjacent sequences:  A129807 A129808 A129809 * A129811 A129812 A129813

KEYWORD

nonn

AUTHOR

Marvin Ray Burns (bmmmburns(AT)sbcglobal.net), May 19 2007

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Last modified February 15 15:20 EST 2012. Contains 205823 sequences.