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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 35 |
| 3 | 34 |
| 4 | 81 |
| 5 | 809 |
| 6 | 1750 |
| 7 | 5071 |
| 8 | 29256 |
| 9 | 93170 |
| 10 | 300067 |
| 11 | 1374813 |
| 12 | 4881352 |
| 13 | 17156265 |
| 14 | 70554601 |
| 15 | 260365422 |
| 16 | 950843894 |
| 17 | 3740973714 |
| 18 | 13990748422 |
| 19 | 52014399980 |
| 20 | 200564580212 |
| 21 | 754390821186 |
| 22 | 2828195071320 |
| 23 | 10800225596334 |
| 24 | 40733212835196 |
[4,35,34,81,809,1750,5071,29256,93170,300067, 1374813,4881352,17156265,70554601,260365422, 950843894,3740973714,13990748422,52014399980, 200564580212,754390821186,2828195071320, 10800225596334,40733212835196] |