191744domain: NAppears in sequencesLengths of the loop of the sequences "Sum of last n digits" beginning with (n-1) zeros followed by digit 1.at n=23A112546Number of (n+1)X(7+1) 0..2 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=13A237636