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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 18 |
| 5 | 36 |
| 6 | 82 |
| 7 | 153 |
| 8 | 300 |
| 9 | 520 |
| 10 | 915 |
| 11 | 1477 |
| 12 | 2437 |
| 13 | 3801 |
| 14 | 6027 |
| 15 | 9095 |
| 16 | 13824 |
| 17 | 20194 |
| 18 | 29734 |
| 19 | 42254 |
| 20 | 60348 |
| 21 | 83730 |
| 22 | 116565 |
| 23 | 158215 |
| 24 | 215375 |
| 25 | 286691 |
| 26 | 382461 |
| 27 | 500451 |
| 28 | 656130 |
| 29 | 846385 |
| 30 | 1094530 |
| 31 | 1395787 |
| 32 | 1784670 |
| 33 | 2254093 |
| 34 | 2853849 |
| 35 | 3573051 |
| 36 | 4482825 |
| 37 | 5565849 |
| 38 | 6922008 |
[1,1,3,7,18,36,82,153,300,520,915,1477,2437,3801, 6027,9095,13824,20194,29734,42254,60348,83730, 116565,158215,215375,286691,382461,500451,656130, 846385,1094530,1395787,1784670,2254093,2853849, 3573051,4482825,5565849,6922008] |