A046802(x,y) --> A046802(x,y+1), transform of e.g.f. for the graded number of positroids of the totally nonnegative Grassmannians G+(k,n); enumerates faces of the stellahedra.
A248727
A046802(x,y) --> A046802(x,y+1), transform of e.g.f. for the graded number of positroids of the totally nonnegative Grassmannians G+(k,n); enumerates faces of the stellahedra.
Terms
- a(0) =1a(1) =2a(2) =1a(3) =5a(4) =5a(5) =1a(6) =16a(7) =24a(8) =10a(9) =1a(10) =65a(11) =130a(12) =84a(13) =19a(14) =1a(15) =326a(16) =815a(17) =720a(18) =265a(19) =36a(20) =1a(21) =1957a(22) =5871a(23) =6605a(24) =3425a(25) =803a(26) =69a(27) =1a(28) =13700a(29) =47950
External references
- oeis: A248727