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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 43 |
| 4 | 177 |
| 5 | 803 |
| 6 | 3481 |
| 7 | 15451 |
| 8 | 67777 |
| 9 | 299091 |
| 10 | 1315881 |
| 11 | 5798155 |
| 12 | 25528785 |
| 13 | 112444547 |
| 14 | 495178681 |
| 15 | 2180862139 |
| 16 | 9604459489 |
| 17 | 42298846131 |
| 18 | 186285317193 |
| 19 | 820411044715 |
| 20 | 3613124902641 |
| 21 | 15912380528099 |
| 22 | 70078852447705 |
| 23 | 308630602346779 |
| 24 | 1359223582397185 |
| 25 | 5986084746384147 |
| 26 | 26362998079555689 |
[1,3,9,43,177,803,3481,15451,67777,299091,1315881, 5798155,25528785,112444547,495178681,2180862139, 9604459489,42298846131,186285317193,820411044715, 3613124902641,15912380528099,70078852447705, 308630602346779,1359223582397185,5986084746384147, 26362998079555689] |