Triangle read by rows: T(n,k) is the number of oriented graphs on n labeled nodes whose underlying graph is k-regular, k = 0..n-1.
A351263
Triangle read by rows: T(n,k) is the number of oriented graphs on n labeled nodes whose underlying graph is k-regular, k = 0..n-1.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =0a(5) =8a(6) =1a(7) =12a(8) =48a(9) =64a(10) =1a(11) =0a(12) =384a(13) =0a(14) =1024a(15) =1a(16) =120a(17) =4480a(18) =35840a(19) =61440a(20) =32768a(21) =1a(22) =0a(23) =59520a(24) =0a(25) =7618560a(26) =0a(27) =2097152a(28) =1a(29) =1680
External references
- oeis: A351263