Square array A(n,k), n>=1, k>=1, read by antidiagonals: A(n,k) is 1/(2*n) times the number of n-colorings of the complete tripartite graph K_(k,k,k).
A212221
Square array A(n,k), n>=1, k>=1, read by antidiagonals: A(n,k) is 1/(2*n) times the number of n-colorings of the complete tripartite graph K_(k,k,k).
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =0a(7) =0a(8) =1a(9) =3a(10) =0a(11) =0a(12) =1a(13) =12a(14) =6a(15) =0a(16) =0a(17) =1a(18) =30a(19) =78a(20) =10a(21) =0a(22) =0a(23) =1a(24) =66a(25) =474a(26) =340a(27) =15a(28) =0a(29) =0
External references
- oeis: A212221