Array read by descending antidiagonals: A(n,k) is the number of unoriented colorings of the facets of a regular n-dimensional orthoplex using up to k colors.

A325013

Array read by descending antidiagonals: A(n,k) is the number of unoriented colorings of the facets of a regular n-dimensional orthoplex using up to k colors.

Terms

    a(0) =1a(1) =3a(2) =1a(3) =6a(4) =6a(5) =1a(6) =10a(7) =21a(8) =22a(9) =1a(10) =15a(11) =55a(12) =267a(13) =402a(14) =1a(15) =21a(16) =120a(17) =1996a(18) =132102a(19) =1228158a(20) =1a(21) =28a(22) =231a(23) =10375a(24) =11756666a(25) =484086357207a(27) =1a(28) =36a(29) =406a(30) =41406

External references