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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 10 |
| 3 | 31 |
| 4 | 68 |
| 5 | 218 |
| 6 | 729 |
| 7 | 2097 |
| 8 | 6139 |
| 9 | 18932 |
| 10 | 57273 |
| 11 | 170792 |
| 12 | 514608 |
| 13 | 1554993 |
| 14 | 4677797 |
| 15 | 14071941 |
| 16 | 42401182 |
| 17 | 127713015 |
| 18 | 384477424 |
| 19 | 1157762858 |
| 20 | 3486768241 |
| 21 | 10499588277 |
| 22 | 31616525407 |
| 23 | 95208917296 |
| 24 | 286707283257 |
| 25 | 863361068252 |
| 26 | 2599853035248 |
[1,10,31,68,218,729,2097,6139,18932,57273,170792, 514608,1554993,4677797,14071941,42401182, 127713015,384477424,1157762858,3486768241, 10499588277,31616525407,95208917296,286707283257, 863361068252,2599853035248] |