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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 10 |
| 4 | 20 |
| 5 | 36 |
| 6 | 64 |
| 7 | 112 |
| 8 | 189 |
| 9 | 308 |
| 10 | 492 |
| 11 | 778 |
| 12 | 1210 |
| 13 | 1844 |
| 14 | 2776 |
| 15 | 4144 |
| 16 | 6114 |
| 17 | 8914 |
| 18 | 12884 |
| 19 | 18484 |
| 20 | 26302 |
| 21 | 37124 |
| 22 | 52040 |
| 23 | 72512 |
| 24 | 100415 |
| 25 | 138196 |
| 26 | 189160 |
| 27 | 257648 |
| 28 | 349184 |
| 29 | 470932 |
| 30 | 632312 |
| 31 | 845472 |
| 32 | 1125853 |
| 33 | 1493222 |
| 34 | 1973060 |
| 35 | 2597892 |
| 36 | 3408754 |
| 37 | 4457600 |
| 38 | 5810544 |
[1,2,4,10,20,36,64,112,189,308,492,778,1210,1844, 2776,4144,6114,8914,12884,18484,26302,37124,52040, 72512,100415,138196,189160,257648,349184,470932, 632312,845472,1125853,1493222,1973060,2597892, 3408754,4457600,5810544] |