108589domain: NAppears in sequencesa(n) is the least k, not multiple of 10, such that k^k contains a palindromic substring of length n.at n=22A115943Number of (n+1) X (3+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=16A258549