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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 40 |
| 2 | 20 |
| 3 | 10 |
| 4 | 5 |
| 5 | 196 |
| 6 | 98 |
| 7 | 49 |
| 8 | 1912 |
| 9 | 956 |
| 10 | 478 |
| 11 | 239 |
| 12 | 9322 |
| 13 | 4661 |
| 14 | 181780 |
| 15 | 90890 |
| 16 | 45445 |
| 17 | 1772356 |
| 18 | 886178 |
| 19 | 443089 |
| 20 | 17280472 |
| 21 | 8640236 |
| 22 | 4320118 |
| 23 | 2160059 |
| 24 | 84242302 |
| 25 | 42121151 |
| 26 | 1642724890 |
| 27 | 821362445 |
| 28 | 32033135356 |
[1,40,20,10,5,196,98,49,1912,956,478,239,9322, 4661,181780,90890,45445,1772356,886178,443089, 17280472,8640236,4320118,2160059,84242302, 42121151,1642724890,821362445,32033135356] |