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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 4 |
| 3 | 11 |
| 4 | 25 |
| 5 | 51 |
| 6 | 97 |
| 7 | 176 |
| 8 | 309 |
| 9 | 530 |
| 10 | 894 |
| 11 | 1490 |
| 12 | 2462 |
| 13 | 4043 |
| 14 | 6610 |
| 15 | 10773 |
| 16 | 17519 |
| 17 | 28445 |
| 18 | 46135 |
| 19 | 74770 |
| 20 | 121115 |
| 21 | 196116 |
| 22 | 317484 |
| 23 | 513876 |
| 24 | 831660 |
| 25 | 1345861 |
| 26 | 2177872 |
| 27 | 3524111 |
| 28 | 5702389 |
| 29 | 9226935 |
| 30 | 14929789 |
[0,1,4,11,25,51,97,176,309,530,894,1490,2462,4043, 6610,10773,17519,28445,46135,74770,121115,196116, 317484,513876,831660,1345861,2177872,3524111, 5702389,9226935,14929789] |