Triangle read by rows: T(n,k) is the number of binary relations on a set of n objects, k of which are picked out, 0 <= k <= n.
A383617
Triangle read by rows: T(n,k) is the number of binary relations on a set of n objects, k of which are picked out, 0 <= k <= n.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =10a(4) =16a(5) =10a(6) =104a(7) =272a(8) =272a(9) =104a(10) =3044a(11) =11456a(12) =16960a(13) =11456a(14) =3044a(15) =291968a(16) =1432608a(17) =2842304a(18) =2842304a(19) =1432608a(20) =291968a(21) =96928992a(22) =578431232a(23) =1441700480a(24) =1920352256a(25) =1441700480a(26) =578431232a(27) =96928992a(28) =112282908928a(29) =784780122880
External references
- oeis: A383617