| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 44 |
| 5 | 184 |
| 6 | 789 |
| 7 | 3435 |
| 8 | 15100 |
| 9 | 66806 |
| 10 | 296870 |
| 11 | 1323318 |
| 12 | 5911972 |
| 13 | 26455294 |
| 14 | 118528793 |
| 15 | 531540891 |
| 16 | 2385375732 |
| 17 | 10710619014 |
| 18 | 48112492938 |
| 19 | 216195753066 |
| 20 | 971744791032 |
| 21 | 4368674392104 |
| 22 | 19643610378738 |
| 23 | 88339070102046 |
| 24 | 397313118498744 |
| 25 | 1787115246076764 |
[1,3,11,44,184,789,3435,15100,66806,296870, 1323318,5911972,26455294,118528793,531540891, 2385375732,10710619014,48112492938,216195753066, 971744791032,4368674392104,19643610378738, 88339070102046,397313118498744,1787115246076764] |