%I #4 Jun 27 2012 13:57:38
%S 1,2,5,13,31,72,156,337,701,1452,2964,6001,12108,24324,48871,97988,
%T 196224,392768,785946,1572353,3145554,6291980
%N Width of the bit-masks A068221 & A068222 (number of digits in A068223 & A068224).
%F a(1) = 1, a(n) = 2*A068739(n-1) + A068059(n-1) - 1
%K nonn
%O 1,2
%A _Antti Karttunen_, Feb 26 2002