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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 2 |
| 10 | 3 |
| 11 | 4 |
| 12 | 5 |
| 13 | 6 |
| 14 | 7 |
| 15 | 8 |
| 16 | 9 |
| 17 | 19 |
| 18 | 38 |
| 19 | 73 |
| 20 | 136 |
| 21 | 247 |
| 22 | 438 |
| 23 | 757 |
| 24 | 1268 |
| 25 | 3303 |
| 26 | 7883 |
| 27 | 17801 |
| 28 | 38745 |
| 29 | 82179 |
| 30 | 170907 |
| 31 | 349341 |
| 32 | 700517 |
| 33 | 2066512 |
| 34 | 5768089 |
| 35 | 15386070 |
| 36 | 39563059 |
| 37 | 98692628 |
| 38 | 239843745 |
| 39 | 569063602 |
| 40 | 1318211431 |
| 41 | 4290275275 |
| 42 | 13443268926 |
[1,1,1,1,1,1,1,1,1,2,3,4,5,6,7,8,9,19,38,73,136, 247,438,757,1268,3303,7883,17801,38745,82179, 170907,349341,700517,2066512,5768089,15386070, 39563059,98692628,239843745,569063602,1318211431, 4290275275,13443268926] |