38794domain: NAppears in sequencesa(n) is the difference between multiples of 7 with even and odd digit sum in base 6 in interval [0,6^n).at n=7A212592a(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)^8).at n=2A212705