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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 13 |
| 5 | 24 |
| 6 | 51 |
| 7 | 97 |
| 8 | 207 |
| 9 | 428 |
| 10 | 946 |
| 11 | 2088 |
| 12 | 4831 |
| 13 | 11209 |
| 14 | 26717 |
| 15 | 64058 |
| 16 | 155725 |
| 17 | 380400 |
| 18 | 936575 |
| 19 | 2314105 |
| 20 | 5744700 |
| 21 | 14300416 |
| 22 | 35708268 |
| 23 | 89359536 |
| 24 | 224121973 |
| 25 | 563126689 |
| 26 | 1417378191 |
| 27 | 3572884062 |
| 28 | 9019324297 |
| 29 | 22797540648 |
[1,3,6,13,24,51,97,207,428,946,2088,4831,11209, 26717,64058,155725,380400,936575,2314105,5744700, 14300416,35708268,89359536,224121973,563126689, 1417378191,3572884062,9019324297,22797540648] |