1019304domain: NAppears in sequencesa(n) = n*(n+1)*(n+7)*(122+57*n+n^2)/120.at n=31A101862Number of ballot results from n voters that prompt a run-off election when three candidates vie for two spots on a board.at n=14A224711a(n) is the number of subsets of {1..n} that contain 5 even and 5 odd numbers.at n=25A331576