Number of nondecreasing sequences of 2n positive integers with reciprocals adding up to n (1 <= n).
A156870
Number of nondecreasing sequences of 2n positive integers with reciprocals adding up to n (1 <= n).
Terms
- a(0) =1a(1) =4a(2) =18a(3) =168a(4) =3648a(5) =298165a(6) =159628076
External references
- oeis: A156870