OFFSET
0,9
COMMENTS
This sequence is positive on average, since 1/log(3) > 1/log(4). Do all integers appear infinitely often? - Charles R Greathouse IV, Feb 07 2013
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 0..10000
FORMULA
EXAMPLE
For n = 7 = 21_3 = 111_2, a(n) = (2+1) - (1+1+1) = 0.
For n = 8 = 22_3 = 1000_2, a(n) = (2+2) - (1+0+0+0) = 3.
For n = 9 = 100_3 = 1001_2, a(n) = (1+0+0) - (1+0+0+1) = -1.
MATHEMATICA
Table[Total[IntegerDigits[n, 3]]-Total[IntegerDigits[n, 2]], {n, 0, 100}] (* Harvey P. Dale, Dec 08 2015 *)
PROG
(PARI) a(n) = sumdigits(n, 3) - sumdigits(n, 2); \\ Michel Marcus, Nov 12 2023
CROSSREFS
KEYWORD
base,sign
AUTHOR
Reinhard Zumkeller, Aug 06 2010
STATUS
approved