OFFSET
1,1
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..10000
FORMULA
Position of 1/2^n: n + floor(n log(2)/log(3)) + floor((n + 1) log(2)/log(3))
Position of 1/3^n: 2n - 2 + floor(n log(3)/log(2))
Position of 2/3^n: 2n + floor(n log(3)/log(2))
EXAMPLE
In the decreasing sequence 2/3, 1/2, 1/3, 1/4, 2/9, 1/8, 1/9, 2/27, 1/16, ..., the positions of 1/2, 1/4, 1/8, 1/6, are 2,4,6,9; the positions of 1/3, 1/9, 1/27,... are 3,7,10,14,...; the positions of 2/3, 2/9,2/27,... are 1,5,8,12,...
MATHEMATICA
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Dec 14 2018
STATUS
approved