45372domain: NAppears in sequencesNumerators of continued fraction convergents to sqrt(135).at n=13A041246Starts for strings of at least five consecutive nonsquarefree numbers.at n=27A078144a(0)=1. a(n) = a(n-1)*(n+1), if n is in the sequence. a(n)= a(n-1) +1, if n is missing from the sequence.at n=21A118471