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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 10 |
| 4 | 24 |
| 5 | 51 |
| 6 | 122 |
| 7 | 244 |
| 8 | 529 |
| 9 | 1090 |
| 10 | 2218 |
| 11 | 4442 |
| 12 | 8865 |
| 13 | 17310 |
| 14 | 33586 |
| 15 | 64659 |
| 16 | 123090 |
| 17 | 232684 |
| 18 | 436572 |
| 19 | 813027 |
| 20 | 1503450 |
| 21 | 2764227 |
| 22 | 5049339 |
| 23 | 9172517 |
| 24 | 16572007 |
| 25 | 29787077 |
| 26 | 53273817 |
| 27 | 94839190 |
| 28 | 168068041 |
| 29 | 296556131 |
| 30 | 521108332 |
| 31 | 912041905 |
[1,1,5,10,24,51,122,244,529,1090,2218,4442,8865, 17310,33586,64659,123090,232684,436572,813027, 1503450,2764227,5049339,9172517,16572007,29787077, 53273817,94839190,168068041,296556131,521108332, 912041905] |