a(n) is the first term in the first chain of at least n consecutive numbers each having exactly four distinct prime factors.

A087977

a(n) is the first term in the first chain of at least n consecutive numbers each having exactly four distinct prime factors.

Terms

    a(0) =210a(1) =7314a(2) =37960a(3) =134043a(4) =357642a(5) =1217250a(6) =1217250a(7) =14273478a(8) =44939642a(9) =76067298a(10) =163459742a(11) =547163235a(12) =2081479430a(13) =2771263512a(14) =11715712410a(15) =17911205580a(16) =56608713884a(17) =118968284928a(18) =118968284928a(19) =585927201062a(20) =585927201062a(21) =585927201062a(22) =585927201062

External references