@heir:
d2020!<2020 = (1508+1087+1317+1416+766+1686+1423+472+47+174+1941+1394+1639+1377+1330+1115+1162+300+283+326+1220+1744+367+1500+291+1923+83+261+1928+1501+1624+20) = 33225