Number of 3-voter voting schemes with n linearly ranked choices.

Terms

a(0) =1a(1) =4a(2) =12a(3) =27a(4) =54a(5) =96a(6) =160a(7) =250a(8) =375a(9) =540a(10) =756a(11) =1029a(12) =1372a(13) =1792a(14) =2304a(15) =2916a(16) =3645a(17) =4500a(18) =5500a(19) =6655a(20) =7986a(21) =9504a(22) =11232a(23) =13182a(24) =15379a(25) =17836a(26) =20580a(27) =23625a(28) =27000a(29) =30720