34087042domain: NAppears in sequencesa(n) = floor((-1 + 2^n)/(1 + 2*n)).at n=30A191630a(n) = floor((1 + 2^n)/(1 + 2*n)).at n=30A191633Base-2 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,0,0,0,0.at n=25A195904