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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 19 |
| 3 | 33 |
| 4 | 2061 |
| 5 | 6563 |
| 6 | 17853 |
| 7 | 2319050 |
| 8 | 2061700 |
| 9 | 57587802 |
| 10 | 2725111202 |
| 11 | 6121395677 |
| 12 | 79432391610 |
| 13 | 5689239922828 |
| 14 | 9667911135850 |
| 15 | 253066675679888 |
| 16 | 959406299366116 |
| 17 | 2267148455007422 |
| 18 | 182092146481798583 |
| 19 | 1074950828335499452 |
| 20 | 3586769629515088106 |
| 21 | 72389675081649855753 |
[1,19,33,2061,6563,17853,2319050,2061700,57587802, 2725111202,6121395677,79432391610,5689239922828, 9667911135850,253066675679888,959406299366116, 2267148455007422,182092146481798583, 1074950828335499452,3586769629515088106, 72389675081649855753] |