A097411 Initial decimal digit of n^7.

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

Offset

1,3

Links

Table of n, a(n) for n=1..103.

Eric Weisstein's World of Mathematics, Gelfand's Question

Example

1, 128, 2187, 16384, 78125, 279936, 823543, 2097152, 4782969, 10000000, ...

Mathematica

Table[First[IntegerDigits[n^7]], {n, 110}] (* Harvey P. Dale, Mar 17 2019 *)

Crossrefs

Cf. A000027, A002993, A002994, A097408, A097409, A097410, A097412, A097413, A097414.

Sequence in context: A200236 A292191 A239155 * A134929 A160413 A295734

Adjacent sequences: A097408 A097409 A097410 * A097412 A097413 A097414

Keyword

nonn,base,easy

Author

Eric W. Weisstein, Aug 16 2004

Extensions

1 prepended by Harvey P. Dale, Mar 17 2019

Status

approved