Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Week | Date | Opponent | Result | Attendance |
| --- | --- | --- | --- | --- |
| 1.0 | September 29, 1946 | Pittsburgh Steelers | T 14-14 | 33620.0 |
| 2.0 | October 6, 1946 | Detroit Lions | W 17-16 | 33569.0 |
| 3.0 | October 13, 1946 | New York Giants | W 24-14 | 33651.0 |
| 4.0 | October 20, 1946 | at Boston Yanks | W 14-6 | 24357.0 |
| 5.0 | October 27, 1946 | Philadelphia Eagles | L 28-24 | 33691.0 |
| 6.0 | November 3, 1946 | at Pittsburgh Steelers | L 14-7 | 39060.0 |
| 7.0 | November 10, 1946 | Boston Yanks | W 17-14 | 33691.0 |
| 8.0 | November 17, 1946 | at Chicago Bears | L 24-20 | 43315.0 |
| 9.0 | November 24, 1946 | at Philadelphia Eagles | W 27-10 | 36366.0 |
| 10.0 | December 1, 1946 | Green Bay Packers | L 20-7 | 33691.0 |
| 11.0 | December 8, 1946 | at New York Giants | L 31-0 | 60337.0 |
Question:
Name the total number of attendance for october 20, 1946 with week less than 4
Answer:
0.0