a(n) = the smallest positive integer not yet occurring such that the number of divisors of 1+sum{k=1 to n} a(k) is exactly n.
A177268
a(n) = the smallest positive integer not yet occurring such that the number of divisors of 1+sum{k=1 to n} a(k) is exactly n.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =8a(4) =12a(5) =36a(6) =6a(7) =30a(8) =62a(9) =862a(10) =11a(11) =3061a(12) =4096a(13) =8192a(14) =17a(15) =49135a(16) =60a(17) =196548a(18) =48a(19) =977a(20) =6143a(21) =3924992a(22) =21a(23) =283131a(24) =15856a(25) =5329a(26) =111a(27) =263936704a(28) =1744a(29) =805304624
External references
- oeis: A177268