1951057domain: NAppears in sequencesa(n) is the difference between multiples of 11 with even and odd decimal digit sum in interval [0,10^n).at n=8A212594a(n) is the difference between numbers of nonnegative multiples of 2*n+1 with even and odd digit sum in base 2*n in interval [0, (2*n)^9).at n=4A212706