Number of singular positroid varieties corresponding to derangements in S_n.
A349456
Number of singular positroid varieties corresponding to derangements in S_n.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =4a(5) =30a(6) =225a(7) =1736a(8) =14476a(9) =132396
External references
- oeis: A349456