A159002 a(n) is the smallest integer k such that the digits of n are at the n-th place in n^k (0 if there is no such k).

1, 5, 5, 5, 6, 7, 32, 10, 9, 0, 11, 81, 17, 64, 74, 347, 185, 187, 34, 65, 16, 112, 178, 29, 18, 91, 117, 142, 183, 61, 21, 259, 66, 114, 166, 27, 28, 67, 27, 65, 26, 120, 33, 37, 99, 177, 103, 60, 29, 71, 110, 69, 200, 132

Offset

1,2

Links

Table of n, a(n) for n=1..54.

Jean-Marc Falcoz, a(n) is the smallest integer k such that the digits of n are at the n-th place in n^k (0 if there is no such k)

Example

a(13) = 17, because 13^17 = 8650415919381337933, and starting at the 13th place, we have 13.

Crossrefs

Sequence in context: A283076 A046263 A092279 * A127934 A205236 A266948

Adjacent sequences: A158999 A159000 A159001 * A159003 A159004 A159005

Keyword

nonn,base

Author

Jean-Marc Falcoz, Apr 02 2009

Status

approved