68272domain: NAppears in sequencesNumbers n such that 10*11^n + 1 is prime.at n=6A057462Array read by antidiagonals: T(n,k) is the number of n-step king's tours on a k X k board summed over all starting positions.at n=51A186861Number of 7-step king's tours on an n X n board summed over all starting positions.at n=3A186866