Even refactorable numbers k such that the number r of odd divisors is odd, the number s of even divisors is even, both r and s are divisors of k and k is the first number for which the triple (r,s,t) occurs, where t is the number of divisors of k.
A120359
Even refactorable numbers k such that the number r of odd divisors is odd, the number s of even divisors is even, both r and s are divisors of k and k is the first number for which the triple (r,s,t) occurs, where t is the number of divisors of k.
Terms
- a(0) =36a(1) =3600a(2) =8100a(3) =10000a(4) =26244a(5) =32400a(6) =142884a(7) =202500a(8) =396900a(9) =518400a(10) =656100a(11) =810000a(12) =1587600a(13) =1679616a(14) =2286144a(15) =2624400a(16) =3572100a(17) =6350400a(18) =9144576a(19) =9922500a(20) =12960000a(21) =14288400a(22) =20575296a(23) =25401600a(24) =28579716a(25) =32148900a(26) =39690000a(27) =41990400a(28) =48024900a(29) =57153600
External references
- oeis: A120359