Number of 6-block bicoverings of an n-set.
A059947
Number of 6-block bicoverings of an n-set.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =3a(4) =256a(5) =7255a(6) =149660a(7) =2681063a(8) =44659776a(9) =714287535a(10) =11154475420a(11) =171673613023
External references
- oeis: A059947