A217171 a(n) is the first digit (from the left) to appear six times in succession in the decimal representation n^A217161(n).

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

Offset

2,1

Links

V. Raman, Table of n, a(n) for n = 2..10000

Mathematica

Table[k = 1; While[d = IntegerDigits[n^k]; df = Partition[Differences[d], 5, 1]; ! MemberQ[df, {0, 0, 0, 0, 0}], k++]; d[[Position[df, {0, 0, 0, 0, 0}][[1, 1]]]], {n, 2, 100}] (* T. D. Noe, Oct 02 2012 *)

Crossrefs

Cf. A217161.

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

Sequence in context: A248570 A242051 A263030 * A357145 A197381 A195454

Adjacent sequences: A217168 A217169 A217170 * A217172 A217173 A217174

Keyword

nonn,base

Author

V. Raman, Sep 27 2012

Status

approved