



0, 3, 6, 12, 15, 21, 24, 27, 30, 33, 39, 42, 48, 51, 54, 57, 60, 66, 69, 75, 78, 84, 87, 93, 96, 102, 105, 108, 111, 114, 120, 123, 129, 132, 135, 138, 141, 147, 150, 156, 159, 165, 168, 174, 177, 183, 186, 189, 192, 195, 201, 204, 210, 213, 216, 219, 222, 228, 231
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OFFSET

1,2


COMMENTS

For n>1: a(n) = 3*A007417(n1);
A014578(a(n)) = 0; A007949(a(n)) mod 2 = 1.
Or numbers which representation in base 3 ends in odd number of zeros. Also numbers having infinitary divisor 3, or the same, having factor 3 in their FermiDirac representation as product of distinct terms of A050376.  Vladimir Shevelev, Mar 18 2013
For n > 1: where even terms occur in A051064.  Reinhard Zumkeller, May 23 2013


LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
Aviezri S. Fraenkel, The vile, dopey, evil and odious game players, Discrete Math. 312 (2012), no. 1, 4246.


MATHEMATICA

Select[ Range[0, 235], (# // IntegerDigits[#, 3]& // Split // Last // Count[#, 0]& // OddQ)&] (* JeanFrançois Alcover, Mar 18 2013 *)


PROG

(Haskell)
a145204 n = a145204_list !! (n1)
a145204_list = 0 : map (+ 1) (findIndices even a051064_list)
 Reinhard Zumkeller, May 23 2013


CROSSREFS

Subsequence of A008585; A016051 is a subsequence.
Sequence in context: A319451 A256882 A191267 * A016051 A070790 A114614
Adjacent sequences: A145201 A145202 A145203 * A145205 A145206 A145207


KEYWORD

nonn


AUTHOR

Reinhard Zumkeller, Oct 04 2008


STATUS

approved



