| Numbers of monomially non-isometric subspaces of F421 |
| Dimension | Numbers |
| 0, 21 | 1 |
| 1, 20 | 21 |
| 2, 19 | 1474 |
| 3, 18 | 9031524 |
| 4, 17 | 8.070050.871607 |
| 5, 16 | 22.659836.168205.042673 |
| 6, 15 | 14.708022.096924.316260.405935 |
| 7, 14 | 853031.424413.761529.652421.875445 |
| 8, 13 | 3388.415887.889262.256830.762913.522105 |
| 9, 12 | 860820.894775.935599.622572.808711.999225 |
| 10, 11 | 13.748346.261149.201962.052193.248324.809103 |
| Numbers of monomially non-isometric subspaces of F421 |