Numbers k with a record value of tau(tau(k)) (A010553), where tau(k) is the number of divisors of k (A000005).
A335831
Numbers k with a record value of tau(tau(k)) (A010553), where tau(k) is the number of divisors of k (A000005).
Terms
- a(0) =1a(1) =2a(2) =6a(3) =12a(4) =60a(5) =360a(6) =1260a(7) =2520a(8) =5040a(9) =55440a(10) =277200a(11) =720720a(12) =3603600a(13) =61261200a(14) =129729600a(15) =908107200a(16) =2205403200a(17) =15437822400a(18) =293318625600
External references
- oeis: A335831