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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 6 |
| 3 | 36 |
| 4 | 98 |
| 5 | 362 |
| 6 | 1180 |
| 7 | 4046 |
| 8 | 13594 |
| 9 | 46052 |
| 10 | 155494 |
| 11 | 525730 |
| 12 | 1776548 |
| 13 | 6004634 |
| 14 | 20293538 |
| 15 | 68587432 |
| 16 | 231806206 |
| 17 | 783444274 |
| 18 | 2647830256 |
| 19 | 8948960354 |
| 20 | 30245088582 |
| 21 | 102220312680 |
| 22 | 345477304222 |
| 23 | 1167620873294 |
| 24 | 3946246173440 |
| 25 | 13337256366382 |
[6,6,36,98,362,1180,4046,13594,46052,155494, 525730,1776548,6004634,20293538,68587432, 231806206,783444274,2647830256,8948960354, 30245088582,102220312680,345477304222, 1167620873294,3946246173440,13337256366382] |