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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 19 |
| 4 | 79 |
| 5 | 334 |
| 6 | 1339 |
| 7 | 5434 |
| 8 | 21754 |
| 9 | 87274 |
| 10 | 349159 |
| 11 | 1397734 |
| 12 | 5590954 |
| 13 | 22368169 |
| 14 | 89472934 |
| 15 | 357908119 |
| 16 | 1431633559 |
| 17 | 5726600854 |
| 18 | 22906403494 |
| 19 | 91625880229 |
| 20 | 366503524969 |
| 21 | 1466015148634 |
| 22 | 5864060611159 |
| 23 | 23456246655574 |
| 24 | 93824986622614 |
| 25 | 375299963333014 |
| 26 | 1501199853398419 |
[1,4,19,79,334,1339,5434,21754,87274,349159, 1397734,5590954,22368169,89472934,357908119, 1431633559,5726600854,22906403494,91625880229, 366503524969,1466015148634,5864060611159, 23456246655574,93824986622614,375299963333014, 1501199853398419] |