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A174658 Balanced ternary numbers with equal count of negative trits and positive trits. 12
0, 2, 6, 8, 16, 18, 20, 24, 26, 32, 46, 48, 52, 54, 56, 60, 62, 70, 72, 74, 78, 80, 86, 96, 98, 104, 130, 136, 138, 142, 144, 146, 154, 156, 160, 162, 164, 168, 170, 178, 180, 182, 186, 188, 194, 208, 210, 214, 216, 218, 222, 224, 232, 234, 236, 240, 242, 248, 258 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Numbers for which the sum of trits is zero.
LINKS
MATHEMATICA
(* First run the program for A065363 to define balTernDigits *) A174658 = Select[Range[0, 299], Plus@@balTernDigits[#] == 0 &] (* Alonso del Arte, Feb 24 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
Sequence in context: A278834 A336896 A306906 * A326300 A266074 A191822
KEYWORD
base,nonn
AUTHOR
Daniel Forgues, Mar 26 2010
STATUS
approved

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Last modified March 29 08:45 EDT 2024. Contains 371267 sequences. (Running on oeis4.)