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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 29 |
| 4 | 124 |
| 5 | 522 |
| 6 | 2318 |
| 7 | 10326 |
| 8 | 47093 |
| 9 | 215889 |
| 10 | 1002539 |
| 11 | 4676951 |
| 12 | 21993457 |
| 13 | 103809737 |
| 14 | 492664617 |
| 15 | 2344988378 |
| 16 | 11206181477 |
| 17 | 53677539149 |
| 18 | 257893535125 |
| 19 | 1241408379020 |
| 20 | 5989883596794 |
| 21 | 28946995943773 |
| 22 | 140157440450573 |
| 23 | 679515076262520 |
| 24 | 3299592366859096 |
| 25 | 16040032702542033 |
| 26 | 78075570545566461 |
[1,2,8,29,124,522,2318,10326,47093,215889,1002539, 4676951,21993457,103809737,492664617,2344988378, 11206181477,53677539149,257893535125, 1241408379020,5989883596794,28946995943773, 140157440450573,679515076262520,3299592366859096, 16040032702542033,78075570545566461] |