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A216105 [7^(5*10^(n+1)) mod 10^(2n+3) - 1]/(10^(2n+2)) mod 10. 1
3, 0, 4, 6, 5, 7, 7, 9, 1, 6, 7, 7, 0, 1, 5, 4, 7, 4, 4, 6, 9, 9, 5, 4, 6, 7, 9, 1, 7, 8, 5, 2, 1, 7, 6, 1, 3, 0, 8, 7, 9, 8, 4, 3, 9, 7, 2, 5, 9, 4, 7, 3, 3, 8, 3, 4, 5, 1, 5, 6, 0, 2, 8, 7, 7, 1, 6, 2, 0, 5, 8, 8, 5, 1, 6, 3, 3, 7, 3, 7, 9, 1, 7, 5, 6, 8, 0, 3, 1, 2, 6, 2, 3, 7, 1, 3, 3, 6, 1, 5, 5, 0, 9, 9, 7, 9, 4, 0, 6, 9, 3, 8 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

7^500 ends in 64030001

7^5000 ends in 5640300001

7^50000 ends in 756403000001

7^500000 ends in 77564030000001

The last digits before the zeros tend to converge to the present sequence.

LINKS

Table of n, a(n) for n=1..112.

CROSSREFS

Cf. A007185, A016090, A091663, A018248, A091664, A018247, A216104.

Sequence in context: A112256 A188720 A113792 * A197022 A112238 A111493

Adjacent sequences:  A216102 A216103 A216104 * A216106 A216107 A216108

KEYWORD

nonn,base

AUTHOR

V. Raman, Sep 02 2012

STATUS

approved

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Last modified September 19 12:57 EDT 2019. Contains 327198 sequences. (Running on oeis4.)