%I A155816
%S A155816 7,5,3,2,1,1,8,6,4,3,2,1,1,7,5,3,2,1,1,9,6,4,3,2,1,1,8,6,4,3,2,1,1,7,5,
%T A155816 3,2,1,1,9
%N A155816 First nonzero digit in the decimal expansion of (cos Pi/4)^n
%e A155816 (cos Pi/4)^4=0.25, so a(4)=2. (cos Pi/4)^8=0.0625, so a(8)=6
%Y A155816 Sequence in context: A087273 A106040 A085927 this_sequence A093824 A019935 
               A144846
%Y A155816 Adjacent sequences: A155813 A155814 A155815 this_sequence A155817 A155818 
               A155819
%K A155816 nonn
%O A155816 0,1
%A A155816 Avik Roy (avik_3.1416(AT)yahoo.co.in), Jan 28 2009