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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 2 |
| 5 | 3 |
| 6 | 7 |
| 7 | 13 |
| 8 | 25 |
| 9 | 54 |
| 10 | 122 |
| 11 | 253 |
| 12 | 558 |
| 13 | 1199 |
| 14 | 2596 |
| 15 | 5619 |
| 16 | 12049 |
| 17 | 25695 |
| 18 | 54733 |
| 19 | 115830 |
| 20 | 244106 |
| 21 | 512444 |
| 22 | 1070965 |
| 23 | 2229313 |
| 24 | 4622382 |
| 25 | 9546244 |
| 26 | 19639568 |
| 27 | 40254273 |
| 28 | 82200330 |
| 29 | 167244370 |
| 30 | 339055002 |
| 31 | 684919569 |
| 32 | 1378730235 |
| 33 | 2765690543 |
| 34 | 5528683663 |
[1,1,2,2,3,7,13,25,54,122,253,558,1199,2596,5619, 12049,25695,54733,115830,244106,512444,1070965, 2229313,4622382,9546244,19639568,40254273, 82200330,167244370,339055002,684919569,1378730235, 2765690543,5528683663] |