Triangle of numbers a(n,k) = number of balance positions when k equal weights are placed at a k-subset of the points {-n, -(n-1), ..., n-1, n} on a centrally pivoted rod.
A047997
Triangle of numbers a(n,k) = number of balance positions when k equal weights are placed at a k-subset of the points {-n, -(n-1), ..., n-1, n} on a centrally pivoted rod.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =3a(5) =5a(6) =1a(7) =4a(8) =8a(9) =12a(10) =1a(11) =5a(12) =13a(13) =24a(14) =32a(15) =1a(16) =6a(17) =18a(18) =43a(19) =73a(20) =94a(21) =1a(22) =7a(23) =25a(24) =69a(25) =141a(26) =227a(27) =289a(28) =1a(29) =8
External references
- oeis: A047997