89979domain: NAppears in sequencesNumbers that require exactly 8 iterations to determine that they are happy or not (A007770 and A031177).at n=14A193996Infinitary Ruth-Aaron numbers: numbers k such that A181894(k) = A181894(k+1).at n=34A330999Unitary Ruth-Aaron numbers: numbers k such that A008475(k) = A008475(k+1).at n=34A331000