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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 11 |
| 4 | 21 |
| 5 | 31 |
| 6 | 110 |
| 7 | 124 |
| 8 | 185 |
| 9 | 279 |
| 10 | 399 |
| 11 | 716 |
| 12 | 1028 |
| 13 | 4552 |
| 14 | 6207 |
| 15 | 6543 |
| 16 | 11424 |
| 17 | 11557 |
| 18 | 12251 |
| 19 | 16199 |
| 20 | 23043 |
| 21 | 43390 |
| 22 | 155798 |
| 23 | 203095 |
| 24 | 457523 |
| 25 | 699782 |
| 26 | 865318 |
| 27 | 1294026 |
| 28 | 2918851 |
| 29 | 5635889 |
| 30 | 6459777 |
| 31 | 8999147 |
| 32 | 9213126 |
| 33 | 22383796 |
| 34 | 28194383 |
| 35 | 32131750 |
| 36 | 105097565 |
| 37 | 404165580 |
[2,4,11,21,31,110,124,185,279,399,716,1028,4552, 6207,6543,11424,11557,12251,16199,23043,43390, 155798,203095,457523,699782,865318,1294026, 2918851,5635889,6459777,8999147,9213126,22383796, 28194383,32131750,105097565,404165580] |