OFFSET
0,2
COMMENTS
The fifth root of 100, known as Pogson's ratio, is the ratio between successive stellar magnitudes.
LINKS
Chai Wah Wu, Table of n, a(n) for n = 0..1000
Eric Weisstein's World of Mathematics, Pogson's Ratio
MATHEMATICA
Table[Round[100^(n/5)], {n, 0, 30}] (* G. C. Greubel, Jan 14 2018 *)
PROG
(PARI) a(n)=round(100^(n/5)) \\ Charles R Greathouse IV, Jan 31 2012
(Python)
from gmpy2 import iroot
def A205770(n):
m = 100**n
i = iroot(m, 5)[0]
return int(i) + int(32*m >= (1+2*i)**5) # Chai Wah Wu, Aug 16 2016
(Magma) [Round(100^(n/5)): n in [0..30]]; // G. C. Greubel, Jan 14 2018
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Franklin T. Adams-Watters, Jan 31 2012
STATUS
approved