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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 10 |
| 3 | 11 |
| 4 | 26 |
| 5 | 80 |
| 6 | 237 |
| 7 | 692 |
| 8 | 2548 |
| 9 | 8240 |
| 10 | 26808 |
| 11 | 92281 |
| 12 | 309903 |
| 13 | 1039489 |
| 14 | 3527966 |
| 15 | 11931702 |
| 16 | 40287280 |
| 17 | 136366907 |
| 18 | 461541474 |
| 19 | 1560895810 |
| 20 | 5282067585 |
| 21 | 17874953308 |
| 22 | 60478794740 |
| 23 | 204650044415 |
| 24 | 692516520567 |
| 25 | 2343315563850 |
| 26 | 7929361264807 |
[1,10,11,26,80,237,692,2548,8240,26808,92281, 309903,1039489,3527966,11931702,40287280, 136366907,461541474,1560895810,5282067585, 17874953308,60478794740,204650044415,692516520567, 2343315563850,7929361264807] |