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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 6 |
| 7 | 11 |
| 8 | 20 |
| 9 | 36 |
| 10 | 64 |
| 11 | 108 |
| 12 | 179 |
| 13 | 292 |
| 14 | 464 |
| 15 | 727 |
| 16 | 1124 |
| 17 | 1714 |
| 18 | 2585 |
| 19 | 3866 |
| 20 | 5724 |
| 21 | 8418 |
| 22 | 12290 |
| 23 | 17830 |
| 24 | 25713 |
| 25 | 36898 |
| 26 | 52664 |
| 27 | 74837 |
| 28 | 105873 |
| 29 | 149178 |
| 30 | 209364 |
| 31 | 292793 |
| 32 | 407990 |
| 33 | 566668 |
| 34 | 784521 |
| 35 | 1082848 |
| 36 | 1490197 |
| 37 | 2045093 |
| 38 | 2798895 |
| 39 | 3820629 |
| 40 | 5202085 |
[1,1,1,2,3,6,11,20,36,64,108,179,292,464,727,1124, 1714,2585,3866,5724,8418,12290,17830,25713,36898, 52664,74837,105873,149178,209364,292793,407990, 566668,784521,1082848,1490197,2045093,2798895, 3820629,5202085] |