18907875domain: NAppears in sequencesPDan numbers: numbers n of the form 3^A * 5^B * 7^C * 11^D with n+-2 and n+-4 prime.at n=10A029712Primordial LB numbers: LB numbers (A267856) that are not of the form 10*n where n is also an LB number.at n=13A268269