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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 4 |
| 4 | 5 |
| 5 | 9 |
| 6 | 14 |
| 7 | 93 |
| 8 | 386 |
| 9 | 865 |
| 10 | 1251 |
| 11 | 13375 |
| 12 | 14626 |
| 13 | 71879 |
| 14 | 3321060 |
| 15 | 10035059 |
| 16 | 13356119 |
| 17 | 36747297 |
| 18 | 50103416 |
| 19 | 86850713 |
| 20 | 136954129 |
| 21 | 223804842 |
| 22 | 808368655 |
| 23 | 13157703322 |
| 24 | 27123775299 |
| 25 | 148776579817 |
| 26 | 175900355116 |
| 27 | 676477645165 |
| 28 | 1528855645446 |
| 29 | 3734188936057 |
[0,1,1,4,5,9,14,93,386,865,1251,13375,14626,71879, 3321060,10035059,13356119,36747297,50103416, 86850713,136954129,223804842,808368655, 13157703322,27123775299,148776579817,175900355116, 676477645165,1528855645446,3734188936057] |