5, 8, 21, 50, 121, 292, 705, 1702, 4109, 9920, 23949, 57818, 139585, 336988, 813561, 1964110, 4741781, 11447672, 27637125, 66721922, 161080969, 388883860, 938848689, 2266581238, 5472011165, 13210603568, 31893218301, 76997040170, 185887298641, 448771637452, 1083430573545