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| n | a(n) |
|---|---|
| 1 | 26040 |
| 2 | 51144 |
| 3 | 105208 |
| 4 | 261760 |
| 5 | 652872 |
| 6 | 1816160 |
| 7 | 4984584 |
| 8 | 14642048 |
| 9 | 42396520 |
| 10 | 129109408 |
| 11 | 388285560 |
| 12 | 1219307472 |
| 13 | 3787652568 |
| 14 | 12248095088 |
| 15 | 39214260632 |
| 16 | 130482679984 |
| 17 | 429827182856 |
| 18 | 1469472591104 |
| 19 | 4968212761480 |
| 20 | 17405604121408 |
[26040,51144,105208,261760,652872,1816160,4984584, 14642048,42396520,129109408,388285560,1219307472, 3787652568,12248095088,39214260632,130482679984, 429827182856,1469472591104,4968212761480, 17405604121408] |