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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 39 |
| 3 | 206 |
| 4 | 1087 |
| 5 | 5832 |
| 6 | 31949 |
| 7 | 178486 |
| 8 | 1013667 |
| 9 | 5832452 |
| 10 | 33896809 |
| 11 | 198496866 |
| 12 | 1168995647 |
| 13 | 6913808272 |
| 14 | 41021119269 |
| 15 | 243974552846 |
| 16 | 1453712656027 |
| 17 | 8674107635292 |
| 18 | 51813825111329 |
| 19 | 309768931954426 |
| 20 | 1853203840458807 |
| 21 | 11092815661905512 |
| 22 | 66427422581744989 |
| 23 | 397927440625389606 |
| 24 | 2384420217810707987 |
[1,7,39,206,1087,5832,31949,178486,1013667, 5832452,33896809,198496866,1168995647,6913808272, 41021119269,243974552846,1453712656027, 8674107635292,51813825111329,309768931954426, 1853203840458807,11092815661905512, 66427422581744989,397927440625389606, 2384420217810707987] |