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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 17 |
| 4 | 46 |
| 5 | 271 |
| 6 | 146 |
| 7 | 1179 |
| 8 | 2948 |
| 9 | 19959 |
| 10 | 23710 |
| 11 | 278911 |
| 12 | 296058 |
| 13 | 4049539 |
| 14 | 4547188 |
| 15 | 3819427 |
| 16 | 8113704 |
| 17 | 142240297 |
| 18 | 57945728 |
| 19 | 1141687557 |
| 20 | 811614110 |
| 21 | 630796959 |
| 22 | 989114644 |
| 23 | 23941114969 |
| 24 | 31470515448 |
[1,4,17,46,271,146,1179,2948,19959,23710,278911, 296058,4049539,4547188,3819427,8113704,142240297, 57945728,1141687557,811614110,630796959,989114644, 23941114969,31470515448] |