Permanent of the n-th principal submatrix of A204427.
A204428
Permanent of the n-th principal submatrix of A204427.
Terms
- a(0) =2a(1) =4a(2) =9a(3) =40a(4) =192a(5) =1032a(6) =7824a(7) =62496a(8) =530712a(9) =5619456a(10) =61710336a(11) =707802624a(12) =9591229440a(13) =133983590400
External references
- oeis: A204428