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| n | a(n) |
|---|---|
| 0 | 16 |
| 1 | 81 |
| 2 | 178 |
| 3 | 259 |
| 4 | 696 |
| 5 | 955 |
| 6 | 10246 |
| 7 | 164891 |
| 8 | 1659156 |
| 9 | 1824047 |
| 10 | 5307250 |
| 11 | 7131297 |
| 12 | 19569844 |
| 13 | 104980517 |
| 14 | 3378946388 |
| 15 | 16999712457 |
| 16 | 37378371302 |
| 17 | 54378083759 |
| 18 | 146134538820 |
| 19 | 200512622579 |
| 20 | 2151260764610 |
| 21 | 34620684856339 |
[16,81,178,259,696,955,10246,164891,1659156, 1824047,5307250,7131297,19569844,104980517, 3378946388,16999712457,37378371302,54378083759, 146134538820,200512622579,2151260764610, 34620684856339] |