Array read by descending antidiagonals: T(n,k) is the number of unoriented colorings of the triangular faces of a regular n-dimensional simplex using k or fewer colors.
A337884
Array read by descending antidiagonals: T(n,k) is the number of unoriented colorings of the triangular faces of a regular n-dimensional simplex using k or fewer colors.
Terms
- a(0) =1a(1) =2a(2) =1a(3) =3a(4) =5a(5) =1a(6) =4a(7) =15a(8) =34a(9) =1a(10) =5a(11) =35a(12) =792a(13) =2136a(14) =1a(15) =6a(16) =70a(17) =10688a(18) =4977909a(19) =7013320a(20) =1a(21) =7a(22) =126a(23) =90005a(24) =1533771392a(27) =1a(28) =8a(29) =210a(30) =533358a(31) =132597435125
External references
- oeis: A337884