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A003235 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 72 |
| 4 | 1322 |
| 5 | 32550 |
| 6 | 1003632 |
| 7 | 37162384 |
| 8 | 1605962556 |
| 9 | 79330914540 |
| 10 | 4409098539560 |
| 11 | 272297452742304 |
| 12 | 18499002436677336 |
| 13 | 1371050716542451672 |
| 14 | 110085169034456183232 |
| 15 | 9519063815009322326400 |
| 16 | 881914870734754844035088 |
| 17 | 87154631117420724492647184 |
[1,1,6,72,1322,32550,1003632,37162384,1605962556, 79330914540,4409098539560,272297452742304, 18499002436677336,1371050716542451672, 110085169034456183232,9519063815009322326400, 881914870734754844035088, 87154631117420724492647184] |