[seqfan] Re: periodicity of expansion of 3/2 in phi-phase A173857

[Richard Mathar]

Continuing on http://list.seqfan.eu/pipermail/seqfan/2010-March/003830.html ,
is there a period length 20 in for the digits of the expansion of 6/5 in 
http://oeis.org/classic/A173859
as well, with associated recurrence 
a(n)= +a(n-2) -a(n-4) +a(n-6) -a(n-8) +a(n-10) -a(n-12) +a(n-14) -a(n-16) +a(n-18) for n>18?

RJM