| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 10 |
| 4 | 36 |
| 5 | 58 |
| 6 | 280 |
| 7 | 338 |
| 8 | 1632 |
| 9 | 2955 |
| 10 | 9512 |
| 11 | 11482 |
| 12 | 83160 |
| 13 | 66922 |
| 14 | 323128 |
| 15 | 780100 |
| 16 | 2354160 |
| 17 | 2273378 |
| 18 | 16465260 |
| 19 | 13250218 |
| 20 | 95966568 |
| 21 | 154455860 |
| 22 | 372889432 |
| 23 | 450117362 |
| 24 | 4346717760 |
| 25 | 3935214363 |
| 26 | 12667263848 |
| 27 | 30581480180 |
| 28 | 110745336312 |
| 29 | 89120964298 |
[1,4,10,36,58,280,338,1632,2955,9512,11482,83160, 66922,323128,780100,2354160,2273378,16465260, 13250218,95966568,154455860,372889432,450117362, 4346717760,3935214363,12667263848,30581480180, 110745336312,89120964298] |