44943domain: NAppears in sequencesa(1) = 7; a(n+1) = a(n)-th composite.at n=44A025011Squarefree numbers k with largest prime factor = floor(sqrt(k)).at n=34A071311a(n) = (8*n+3)*(8*n+5).at n=26A177065Variation on Fermat's Diophantine m-tuple: 1 + the GCD of any two distinct terms is a square.at n=25A274697