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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 9 |
| 4 | 22 |
| 5 | 48 |
| 6 | 96 |
| 7 | 181 |
| 8 | 327 |
| 9 | 573 |
| 10 | 982 |
| 11 | 1656 |
| 12 | 2760 |
| 13 | 4561 |
| 14 | 7491 |
| 15 | 12249 |
| 16 | 19966 |
| 17 | 32472 |
| 18 | 52728 |
| 19 | 85525 |
| 20 | 138615 |
| 21 | 224541 |
| 22 | 363598 |
| 23 | 588624 |
| 24 | 952752 |
| 25 | 1541953 |
| 26 | 2495331 |
| 27 | 4037961 |
| 28 | 6534022 |
| 29 | 10572768 |
| 30 | 17107632 |
| 31 | 27681301 |
| 32 | 44789895 |
| 33 | 72472221 |
| 34 | 117263206 |
[0,1,3,9,22,48,96,181,327,573,982,1656,2760,4561, 7491,12249,19966,32472,52728,85525,138615,224541, 363598,588624,952752,1541953,2495331,4037961, 6534022,10572768,17107632,27681301,44789895, 72472221,117263206] |