This is the sum of the seeds of the teams which make the round of 16 of the US NCAA Basketball Tournament. Each of the 4 regions works like its own sub-tournament with seeds of 1-16. There are 64 or is it 128 now? teams total. Actually a few more pairs of teams have to win one “play-in” game. So it’s something like 66 or 68 teams total, but the winners of the play-in games get a 16th seed.

If the brackets perfectly predict the results in a region, then seeds 1 through 4 will make it to the semi-final of that region. Their total would be 1+2+3+4=10. If all 4 regions have no upsets in the first two rounds, the sum of the seeds will be 40. This is the minimum possible number for this metric. The more upsets (a lower seed with a higher number beating a more favored team), the higher the sum of seeds.