%I
%S 1,0,2,2,4,2,2,3,6,3,2,2,4,2,3,4,8,4,3,2,4,2,2,4,6,3,2,2,4,2,4,5,10,5,
%T 4,2,4,2,2,3,6,3,2,2,4,2,4,4,8,4,3,3,4,2,2,3,6,3,2,2,4,3,5,6,12,6,5,3,
%U 4,2,2,3,6,3,2,2,4,2,3,4,8,4,3,2,4,4,2,3,6,3,2,6,4,4,4,5,10,5,4,2,4,2
%N Length of longest contiguous block of 0's in binary expansion of n^2.
%C a(n) = A087117(A000290(n)).
%Y Cf. A023416, A090049, A090048, A090046, A090001.
%K nonn,base
%O 0,3
%A _Reinhard Zumkeller_, Nov 20 2003
