The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 5 |
| 3 | 14 |
| 4 | 38 |
| 5 | 85 |
| 6 | 196 |
| 7 | 401 |
| 8 | 830 |
| 9 | 1615 |
| 10 | 3119 |
| 11 | 5802 |
| 12 | 10718 |
| 13 | 19246 |
| 14 | 34276 |
| 15 | 59889 |
| 16 | 103656 |
| 17 | 176801 |
| 18 | 299025 |
| 19 | 499732 |
| 20 | 828638 |
| 21 | 1360696 |
| 22 | 2218128 |
| 23 | 3586194 |
| 24 | 5759839 |
| 25 | 9184715 |
| 26 | 14557974 |
| 27 | 22929745 |
| 28 | 35916469 |
| 29 | 55942850 |
| 30 | 86695329 |
| 31 | 133671740 |
| 32 | 205144324 |
| 33 | 313380895 |
| 34 | 476667370 |
[0,1,5,14,38,85,196,401,830,1615,3119,5802,10718, 19246,34276,59889,103656,176801,299025,499732, 828638,1360696,2218128,3586194,5759839,9184715, 14557974,22929745,35916469,55942850,86695329, 133671740,205144324,313380895,476667370] |