Number of ordered n-tuples (x_1, x_2, x_3, ..., x_n) such that Sum_{k=1..n} 1/x_k is an integer and x_k is an integer between 1 and n for 1 <= k <= n.
A349146
Number of ordered n-tuples (x_1, x_2, x_3, ..., x_n) such that Sum_{k=1..n} 1/x_k is an integer and x_k is an integer between 1 and n for 1 <= k <= n.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =25a(5) =82a(6) =1310a(7) =6757a(8) =73204a(9) =612534a(10) =12021898a(11) =100648935a(12) =3293923530a(13) =30781757528a(14) =543076024093
External references
- oeis: A349146