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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 265 |
| 3 | 2780 |
| 4 | 19250 |
| 5 | 91067 |
| 6 | 349122 |
| 7 | 1115334 |
| 8 | 3134307 |
| 9 | 7903501 |
| 10 | 18286018 |
| 11 | 39418159 |
| 12 | 79946582 |
| 13 | 154050794 |
| 14 | 283766861 |
| 15 | 503208408 |
| 16 | 861586362 |
| 17 | 1432132554 |
| 18 | 2314882321 |
| 19 | 3655071196 |
| 20 | 5640732550 |
| 21 | 8538547541 |
| 22 | 12683700617 |
| 23 | 18541085573 |
[1,10,265,2780,19250,91067,349122,1115334,3134307, 7903501,18286018,39418159,79946582,154050794, 283766861,503208408,861586362,1432132554, 2314882321,3655071196,5640732550,8538547541, 12683700617,18541085573] |