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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 16 |
| 3 | 21 |
| 4 | 199 |
| 5 | 556 |
| 6 | 442 |
| 7 | 2827 |
| 8 | 5680 |
| 9 | 3651 |
| 10 | 19960 |
| 11 | 35039 |
| 12 | 19820 |
| 13 | 96084 |
| 14 | 151800 |
| 15 | 78205 |
| 16 | 354360 |
| 17 | 525467 |
| 18 | 255143 |
| 19 | 1089594 |
| 20 | 1531163 |
| 21 | 707770 |
| 22 | 2908481 |
| 23 | 3937393 |
| 24 | 1758805 |
| 25 | 6976823 |
| 26 | 9145189 |
| 27 | 3964264 |
| 28 | 15328243 |
| 29 | 19618905 |
| 30 | 8309214 |
| 31 | 31406219 |
| 32 | 39327693 |
| 33 | 16320584 |
| 34 | 60602426 |
[1,3,16,21,199,556,442,2827,5680,3651,19960,35039, 19820,96084,151800,78205,354360,525467,255143, 1089594,1531163,707770,2908481,3937393,1758805, 6976823,9145189,3964264,15328243,19618905,8309214, 31406219,39327693,16320584,60602426] |