Number of partitions of {1, ..., 2n} into coprime pairs.
A009679
Number of partitions of {1, ..., 2n} into coprime pairs.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =18a(4) =60a(5) =252a(6) =1860a(7) =9552a(8) =59616a(9) =565920a(10) =4051872a(11) =33805440a(12) =465239808a(13) =4294865664a(14) =35413136640a(15) =768372168960
External references
- oeis: A009679