112229domain: NAppears in sequencesPisot sequence T(5,21), a(n) = floor( a(n-1)^2/a(n-2) ).at n=7A010925a(n) = 4*a(n-1) + a(n-2) - a(n-3) - a(n-5).at n=7A019992Numbers having digits in nondecreasing order and repeatedly setting n := A066308(n) yields a constant nonzero n.at n=13A256242