OFFSET
0,3
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..10000
FORMULA
a(n^7) = n for n >= 0. - Seiichi Manyama, Jan 30 2017
EXAMPLE
a(2)=3, because 3^7=2187 is the first 7th power with the most significant digit 2;
a(16)=4, because 4^7=16384 is the first 7th power whose two most significant digits are 16.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
EXTENSIONS
Added initial 0. - Seiichi Manyama, Jan 30 2017
STATUS
approved