login
A174659
Balanced ternary numbers with more positive trits than negative trits.
4
1, 3, 4, 7, 9, 10, 11, 12, 13, 19, 21, 22, 25, 27, 28, 29, 30, 31, 33, 34, 35, 36, 37, 38, 39, 40, 49, 55, 57, 58, 61, 63, 64, 65, 66, 67, 73, 75, 76, 79, 81, 82, 83, 84, 85, 87, 88, 89, 90, 91, 92, 93, 94, 97, 99, 100, 101, 102, 103, 105, 106, 107, 108, 109, 110, 111, 112
OFFSET
1,2
COMMENTS
Numbers for which the sum of trits is positive.
LINKS
MATHEMATICA
(* First run the program for A065363 to define balTernDigits *) Select[Range[210], Count[balTernDigits[#], -1] < Count[balTernDigits[#], 1] &] (* Alonso del Arte, Feb 26 2011 *)
PROG
(Python)
def a(n):
s=0
x=0
while n>0:
x=n%3
n//=3
if x==2:
x=-1
n+=1
s+=x
return s
print([n for n in range(301) if a(n)>0]) # Indranil Ghosh, Jun 07 2017
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Daniel Forgues, Mar 26 2010
STATUS
approved