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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 70 |
| 5 | 633 |
| 6 | 7821 |
| 7 | 117709 |
| 8 | 2097684 |
| 9 | 43047545 |
| 10 | 1000010125 |
| 11 | 25937439391 |
| 12 | 743008621422 |
| 13 | 23298085496173 |
| 14 | 793714780786669 |
| 15 | 29192926036832363 |
| 16 | 1152921504875352376 |
| 17 | 48661191876077295937 |
| 18 | 2185911559749718388655 |
| 19 | 104127350297928227579629 |
[1,3,11,70,633,7821,117709,2097684,43047545, 1000010125,25937439391,743008621422, 23298085496173,793714780786669,29192926036832363, 1152921504875352376,48661191876077295937, 2185911559749718388655,104127350297928227579629] |