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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 3 |
| 6 | 6 |
| 7 | 9 |
| 8 | 12 |
| 9 | 15 |
| 10 | 24 |
| 11 | 42 |
| 12 | 69 |
| 13 | 105 |
| 14 | 151 |
| 15 | 224 |
| 16 | 351 |
| 17 | 559 |
| 18 | 875 |
| 19 | 1331 |
| 20 | 2009 |
| 21 | 3071 |
| 22 | 4760 |
| 23 | 7400 |
| 24 | 11417 |
| 25 | 17486 |
| 26 | 26768 |
| 27 | 41153 |
| 28 | 63504 |
| 29 | 97979 |
| 30 | 150788 |
| 31 | 231651 |
| 32 | 355985 |
| 33 | 547828 |
| 34 | 843774 |
| 35 | 1299209 |
| 36 | 1998922 |
| 37 | 3074277 |
| 38 | 4729178 |
| 39 | 7277986 |
| 40 | 11202381 |
| 41 | 17240300 |
| 42 | 26526635 |
[1,1,1,1,1,3,6,9,12,15,24,42,69,105,151,224,351, 559,875,1331,2009,3071,4760,7400,11417,17486, 26768,41153,63504,97979,150788,231651,355985, 547828,843774,1299209,1998922,3074277,4729178, 7277986,11202381,17240300,26526635] |