| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 1 |
| 8 | 7 |
| 9 | 37 |
| 10 | 22 |
| 11 | 264 |
| 12 | 310 |
| 13 | 1181 |
| 14 | 2350 |
| 15 | 8102 |
| 16 | 38471 |
| 17 | 136528 |
| 18 | 738072 |
| 19 | 2811383 |
| 20 | 12163208 |
| 21 | 45121906 |
| 22 | 160620225 |
| 23 | 729516611 |
| 24 | 3962353196 |
[1,1,0,0,1,0,1,1,7,37,22,264,310,1181,2350,8102, 38471,136528,738072,2811383,12163208,45121906, 160620225,729516611,3962353196] |