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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 5 |
| 4 | 12 |
| 5 | 24 |
| 6 | 53 |
| 7 | 117 |
| 8 | 246 |
| 9 | 580 |
| 10 | 1178 |
| 11 | 2916 |
| 12 | 5768 |
| 13 | 14834 |
| 14 | 28731 |
| 15 | 76221 |
| 16 | 145108 |
| 17 | 395048 |
| 18 | 741392 |
| 19 | 2063104 |
| 20 | 3825418 |
| 21 | 10847078 |
| 22 | 19907156 |
| 23 | 57373672 |
| 24 | 104370554 |
| 25 | 305110106 |
| 26 | 550816506 |
| 27 | 1630489090 |
| 28 | 2924018194 |
| 29 | 8751851866 |
[1,1,3,5,12,24,53,117,246,580,1178,2916,5768, 14834,28731,76221,145108,395048,741392,2063104, 3825418,10847078,19907156,57373672,104370554, 305110106,550816506,1630489090,2924018194, 8751851866] |