8819171domain: NAppears in sequencesa(n)^2 is smallest square starting with a string of n 7's.at n=6A034990a(n)^2 is smallest square starting with a string of n 7's.at n=7A034990a(n) = A077729(n)^(1/2).at n=6A077730Numbers whose square starts with 7 identical digits.at n=11A133183