Triangular array read by rows. T(n,k) is the number of k-colored labeled digraphs with n vertices, n>=1, 1<=k<=n.
A240955
Triangular array read by rows. T(n,k) is the number of k-colored labeled digraphs with n vertices, n>=1, 1<=k<=n.
Terms
- a(0) =1a(1) =1a(2) =8a(3) =1a(4) =96a(5) =384a(6) =1a(7) =2048a(8) =36864a(9) =98304a(10) =1a(11) =84480a(12) =6881280a(13) =62914560a(14) =125829120a(15) =1a(16) =7221248a(17) =3043491840a(18) =80530636800a(19) =483183820800a(20) =773094113280a(21) =1a(22) =1218502656a(28) =1a(29) =421846581248
External references
- oeis: A240955