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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 9 |
| 2 | 19 |
| 3 | 28 |
| 4 | 75 |
| 5 | 178 |
| 6 | 965 |
| 7 | 4038 |
| 8 | 5003 |
| 9 | 9041 |
| 10 | 122536 |
| 11 | 131577 |
| 12 | 254113 |
| 13 | 1148029 |
| 14 | 5994258 |
| 15 | 13136545 |
| 16 | 32267348 |
| 17 | 45403893 |
| 18 | 123075134 |
| 19 | 1153080099 |
| 20 | 32409317906 |
| 21 | 292836941253 |
| 22 | 618083200412 |
| 23 | 910920141665 |
| 24 | 2439923483742 |
| 25 | 5790767109149 |
| 26 | 31393759029487 |
[1,9,19,28,75,178,965,4038,5003,9041,122536, 131577,254113,1148029,5994258,13136545,32267348, 45403893,123075134,1153080099,32409317906, 292836941253,618083200412,910920141665, 2439923483742,5790767109149,31393759029487] |