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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 4 |
| 5 | 7 |
| 6 | 11 |
| 7 | 16 |
| 8 | 29 |
| 9 | 42 |
| 10 | 72 |
| 11 | 121 |
| 12 | 191 |
| 13 | 367 |
| 14 | 693 |
| 15 | 1215 |
| 16 | 2221 |
| 17 | 4116 |
| 18 | 7577 |
| 19 | 13900 |
| 20 | 25634 |
| 21 | 48322 |
| 22 | 90046 |
| 23 | 169016 |
| 24 | 317819 |
| 25 | 600982 |
| 26 | 1138049 |
| 27 | 2158939 |
| 28 | 4103414 |
| 29 | 7818761 |
| 30 | 14923641 |
| 31 | 28534404 |
| 32 | 54624906 |
| 33 | 104786140 |
| 34 | 201233500 |
| 35 | 386914300 |
| 36 | 744876280 |
| 37 | 1435592207 |
[0,1,3,4,7,11,16,29,42,72,121,191,367,693,1215, 2221,4116,7577,13900,25634,48322,90046,169016, 317819,600982,1138049,2158939,4103414,7818761, 14923641,28534404,54624906,104786140,201233500, 386914300,744876280,1435592207] |