A217174 a(n) is the first digit (from the left) to appear nine times in succession in the decimal representation of n^A217164(n).

9, 2, 9, 5, 1, 0, 9, 1, 0, 9, 2, 8, 8, 6, 9, 0, 7, 8, 0, 6, 7, 5, 7, 5, 2, 2, 7, 6, 0, 1, 9, 9, 4, 6, 6, 2, 3, 7, 0, 2, 5, 3, 1, 5, 6, 3, 9, 0, 0, 8, 4, 3, 1, 6, 5, 1, 9, 6, 0, 4, 4, 7, 9, 6, 6, 5, 8, 1, 0, 3, 5, 9, 7, 7, 3, 0, 7, 6, 0, 1, 9, 5, 3, 6, 7, 0, 4

Offset

2,1

Links

Table of n, a(n) for n=2..88.

Mathematica

Table[k = 1; While[d = IntegerDigits[n^k]; df = Partition[Differences[d], 8, 1]; ! MemberQ[df, {0, 0, 0, 0, 0, 0, 0, 0}], k++]; d[[Position[df, {0, 0, 0, 0, 0, 0, 0, 0}][[1, 1]]]], {n, 2, 10}] (* T. D. Noe, Oct 02 2012 *)

Crossrefs

Cf. A217164.

Cf. A215732, A215733, A215734, A215735, A215736, A215737.

Sequence in context: A348870 A217626 A275362 * A230157 A260646 A200234

Adjacent sequences: A217171 A217172 A217173 * A217175 A217176 A217177

Keyword

nonn,base

Author

V. Raman, Sep 27 2012

Status

approved