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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 4 |
| 3 | 19 |
| 4 | 41 |
| 5 | 116 |
| 6 | 295 |
| 7 | 781 |
| 8 | 2036 |
| 9 | 5339 |
| 10 | 13969 |
| 11 | 36580 |
| 12 | 95759 |
| 13 | 250709 |
| 14 | 656356 |
| 15 | 1718371 |
| 16 | 4498745 |
| 17 | 11777876 |
| 18 | 30834871 |
| 19 | 80726749 |
| 20 | 211345364 |
| 21 | 553309355 |
| 22 | 1448582689 |
| 23 | 3792438724 |
| 24 | 9928733471 |
| 25 | 25993761701 |
| 26 | 68052551620 |
| 27 | 178163893171 |
| 28 | 466439127881 |
| 29 | 1221153490484 |
[1,5,4,19,41,116,295,781,2036,5339,13969,36580, 95759,250709,656356,1718371,4498745,11777876, 30834871,80726749,211345364,553309355,1448582689, 3792438724,9928733471,25993761701,68052551620, 178163893171,466439127881,1221153490484] |