97989domain: NAppears in sequencesNumbers that require exactly 8 iterations to determine that they are happy or not (A007770 and A031177).at n=17A193996Number of 5Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 1 and 1 1 0 vertically.at n=7A207887