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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 46 |
| 3 | 357 |
| 4 | 1952 |
| 5 | 8518 |
| 6 | 31605 |
| 7 | 103546 |
| 8 | 307087 |
| 9 | 838936 |
| 10 | 2138608 |
| 11 | 5137407 |
| 12 | 11719956 |
| 13 | 25549096 |
| 14 | 53493458 |
| 15 | 108027996 |
| 16 | 211167710 |
| 17 | 400765157 |
| 18 | 740380790 |
| 19 | 1334456849 |
| 20 | 2351234708 |
| 21 | 4056807390 |
| 22 | 6864961455 |
| 23 | 11409118950 |
| 24 | 18644841765 |
| 25 | 29994129570 |
[3,46,357,1952,8518,31605,103546,307087,838936, 2138608,5137407,11719956,25549096,53493458, 108027996,211167710,400765157,740380790, 1334456849,2351234708,4056807390,6864961455, 11409118950,18644841765,29994129570] |