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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 6 |
| 3 | 10 |
| 4 | 42 |
| 5 | 34 |
| 6 | 786 |
| 7 | 130 |
| 8 | 17058 |
| 9 | 81154 |
| 10 | 545346 |
| 11 | 2050 |
| 12 | 102457218 |
| 13 | 8194 |
| 14 | 1141636866 |
| 15 | 72648608770 |
| 16 | 648648065538 |
| 17 | 131074 |
| 18 | 111258180895746 |
| 19 | 524290 |
| 20 | 40892974286411778 |
| 21 | 229774078552113154 |
| 22 | 28890711351291906 |
| 23 | 8388610 |
| 24 | 3552178288049960329218 |
| 25 | 34469355651846669074434 |
[1,2,6,10,42,34,786,130,17058,81154,545346,2050, 102457218,8194,1141636866,72648608770, 648648065538,131074,111258180895746,524290, 40892974286411778,229774078552113154, 28890711351291906,8388610,3552178288049960329218, 34469355651846669074434] |