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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 5 |
| 10 | 10 |
| 11 | 6 |
| 12 | 21 |
| 13 | 77 |
| 14 | 55 |
| 15 | 145 |
| 16 | 899 |
| 17 | 868 |
| 18 | 1988 |
| 19 | 38411 |
| 20 | 90347 |
| 21 | 95357 |
| 22 | 637807 |
| 23 | 3506263 |
| 24 | 2382501 |
| 25 | 19519203 |
| 26 | 649945741 |
| 27 | 911672929 |
| 28 | 3857971277 |
| 29 | 130630182325 |
| 30 | 366719420575 |
| 31 | 764101349503 |
| 32 | 12533062448579 |
| 33 | 136235802233249 |
[1,1,1,1,1,1,1,1,5,10,6,21,77,55,145,899,868,1988, 38411,90347,95357,637807,3506263,2382501,19519203, 649945741,911672929,3857971277,130630182325, 366719420575,764101349503,12533062448579, 136235802233249] |