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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 15 |
| 5 | 92 |
| 6 | 436 |
| 7 | 1993 |
| 8 | 9478 |
| 9 | 43638 |
| 10 | 187235 |
| 11 | 809030 |
| 12 | 3365945 |
| 13 | 13510461 |
| 14 | 53274149 |
| 15 | 204598179 |
| 16 | 765394402 |
| 17 | 2806261890 |
| 18 | 10071367726 |
| 19 | 35409883104 |
| 20 | 122234932333 |
| 21 | 414412164610 |
| 22 | 1380949308381 |
| 23 | 4527966672187 |
| 24 | 14616894999438 |
| 25 | 46485172533638 |
[1,1,5,15,92,436,1993,9478,43638,187235,809030, 3365945,13510461,53274149,204598179,765394402, 2806261890,10071367726,35409883104,122234932333, 414412164610,1380949308381,4527966672187, 14616894999438,46485172533638] |