Number of preferential arrangements of n labeled elements when only k <= 3 ranks are allowed.
A101052
Number of preferential arrangements of n labeled elements when only k <= 3 ranks are allowed.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =13a(4) =51a(5) =181a(6) =603a(7) =1933a(8) =6051a(9) =18661a(10) =57003a(11) =173053a(12) =523251a(13) =1577941a(14) =4750203a(15) =14283373a(16) =42915651a(17) =128878021a(18) =386896203a(19) =1161212893a(20) =3484687251a(21) =10456158901a(22) =31372671003a(23) =94126401613a(24) =282395982051a(25) =847221500581
External references
- oeis: A101052