%I #17 Nov 18 2018 10:07:48
%S 1,2,1,2,1,1,1,7,3,2,2,2,1,1,2,1,1,2,1,1,1,2,3,2,1,1,3,1,1,1,2,1,1,3,
%T 2,1,3,1,1,2,1,3,1,1,3,1,3,1,1,2,2,1,1,2,4,1,1,1,1,1,1,3,4,1,1,1,1,4,
%U 1,3,2,1,1,2,1,2,2,1,2,1,1,1,1,1,2,1,2,1,4,1,1,1,1,2,1,1,2,1,1,2,2,1,3,1,6,1,3,1,1,4,2,1
%N Differences between positions of 0's in binary expansion of Pi.
%F a(n) = A320300(n+1) - A320300(n) (this is about Pi/4, but they are essentially the same).
%t Differences[Flatten[Position[RealDigits[Pi, 2, 200][[1]], 0]]] (* _Alonso del Arte_, Oct 11 2018 *)
%Y Cf. A320300, A320302.
%K nonn,base
%O 1,2
%A _Jack Zhang_, Oct 10 2018