A320298 - OEIS

%I #18 Nov 10 2018 09:33:18

%S 1,3,3,5,1,1,1,1,1,2,1,2,2,2,4,4,5,2,1,2,4,1,5,4,1,2,3,1,4,3,1,4,1,3,

%T 1,4,2,4,2,1,1,8,1,2,1,1,6,1,1,3,1,2,4,3,2,3,7,3,3,1,1,6,4,4,2,3,1,3,

%U 1,1,1,1,3,1,4,1,1,2,9,6,2,1,1,2,1,1,1,1,2,2,3,1,4,1,1,2,1,4,3,1,1,3,1,2,1,3,4,3,2,4,2,3,2,6,5,1,1,1,3,1,4,1,1,4,1,2,8,3,1,2,1,1,2,1,1,1,2,1,1,1,1,3,2,2,4,1,3,1,2,1,3,1,1,1,3,1,2,3,1,1,2,3,5,1,4,1,2,1,3,1,7,2,2,1,5,2,3,1,2,1,2,1,1,1,1,3

%N Differences between positions of 1's in binary expansion of Pi.

%F a(n) = A004711(n+1) - A004711(n) (A004711 is concerned with Pi/4, but they are essentially the same).

%t Differences@ Position[RealDigits[Pi, 2, 250][[1]], 1][[All, 1]] (* _Michael De Vlieger_, Oct 20 2018 *)

%Y Cf. A004711, A320299.

%K nonn,base

%O 1,2

%A _Jack Zhang_, Oct 10 2018