OFFSET
1,2
REFERENCES
Erwin Voellmy, Fünfstellige Logarithmen und Zahlentafeln, 15th edition, Orell Foessli Verlag, Zurich (1962).
LINKS
Wikipedia, Common logarithm
FORMULA
a(n) = floor(10*(log_10(n) - floor(log_10(n)))).
EXAMPLE
a(6) = 7, because log_10(6) = 0.77815...
MAPLE
A135319 := proc(n) floor(10*log[10](n)) mod 10 ; end: seq(A135319(n), n=1..80) ; # R. J. Mathar, Jan 11 2008
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Pahikkala Jussi, Dec 06 2007, Jan 13 2008
EXTENSIONS
More terms from R. J. Mathar and N. J. A. Sloane, Jan 11 2008
STATUS
approved