A076494 - OEIS

%I #5 Oct 15 2013 22:31:34

%S 0,0,0,0,0,0,1,2,2,3,2,1,2,3,2,1,2,2,3,4,3,2,1,1,1,4,4,5,6,6,4,3,3,5,

%T 6,6,5,4,4,5,5,5,6,7,6,6,7,6,6,7,7,6,5,5,6,5,7,8,7,8,8,8,8,8,8,7,9,9,

%U 9,7,6,7,7,8,8,8,7,9,9,8,9,9,9,9,8,9,10,10,9,7,8,8,9,10,10,10,10,9,9,10,9

%N Number of common decimal digits of 2^n and 2^(1+n).

%t Table[Length[Intersection[IntegerDigits[2^n], InterDigits[2^(n+1)]]], {n, 1, 100}]

%Y Cf. A006880, A076489-A076493.

%K base,nonn

%O 1,8

%A _Labos Elemer_, Oct 21 2002