Triangle read by rows: T(n,k) is the number of unordered pairs of vertices at distance k in the cube Q_n of dimension n (1 <= k <= n).
A143376
Triangle read by rows: T(n,k) is the number of unordered pairs of vertices at distance k in the cube Q_n of dimension n (1 <= k <= n).
Terms
- a(0) =1a(1) =4a(2) =2a(3) =12a(4) =12a(5) =4a(6) =32a(7) =48a(8) =32a(9) =8a(10) =80a(11) =160a(12) =160a(13) =80a(14) =16a(15) =192a(16) =480a(17) =640a(18) =480a(19) =192a(20) =32a(21) =448a(22) =1344a(23) =2240a(24) =2240a(25) =1344a(26) =448a(27) =64a(28) =1024a(29) =3584
External references
- oeis: A143376