Triangle read by rows: T(n,k) is the number of unoriented colorings of the edges of a regular n-D orthoplex (or ridges of a regular n-D orthotope) using exactly k colors. Row 1 has 1 column; row n>1 has 2*n*(n-1) columns.
A338147
Triangle read by rows: T(n,k) is the number of unoriented colorings of the edges of a regular n-D orthoplex (or ridges of a regular n-D orthotope) using exactly k colors. Row 1 has 1 column; row n>1 has 2*n*(n-1) columns.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =6a(4) =3a(5) =1a(6) =142a(7) =11682a(8) =310536a(9) =3460725a(10) =19870590a(11) =65886660a(12) =133585200a(13) =168399000a(14) =128898000a(15) =54885600a(16) =9979200a(17) =1a(18) =49125a(19) =740212980a(20) =730815102166
External references
- oeis: A338147