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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 28 |
| 3 | 91 |
| 4 | 298 |
| 5 | 982 |
| 6 | 3241 |
| 7 | 10702 |
| 8 | 35344 |
| 9 | 116731 |
| 10 | 385534 |
| 11 | 1273330 |
| 12 | 4205521 |
| 13 | 13889890 |
| 14 | 45875188 |
| 15 | 151515451 |
| 16 | 500421538 |
| 17 | 1652780062 |
| 18 | 5458761721 |
| 19 | 18029065222 |
| 20 | 59545957384 |
| 21 | 196666937371 |
| 22 | 649546769494 |
| 23 | 2145307245850 |
| 24 | 7085468507041 |
[1,10,28,91,298,982,3241,10702,35344,116731, 385534,1273330,4205521,13889890,45875188, 151515451,500421538,1652780062,5458761721, 18029065222,59545957384,196666937371,649546769494, 2145307245850,7085468507041] |