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| n | a(n) |
|---|---|
| 2 | 0 |
| 3 | 1 |
| 4 | 4 |
| 5 | 8 |
| 6 | 8 |
| 7 | 9 |
| 8 | 110 |
| 9 | 572 |
| 10 | 2496 |
| 11 | 5762 |
| 12 | 3254 |
| 13 | 5020 |
| 14 | 117912 |
| 15 | 307819 |
| 16 | 420394 |
| 17 | 677350 |
| 18 | 9611700 |
| 19 | 58689330 |
| 20 | 32290388 |
| 21 | 430183260 |
| 22 | 180484980 |
| 23 | 5983159650 |
| 24 | 44850171444 |
| 25 | 120220997328 |
| 26 | 235364198128 |
| 27 | 135740049556 |
| 28 | 2107819739960 |
| 29 | 5252440129232 |
| 30 | 37484769529504 |
| 31 | 125244830989069 |
[0,1,4,8,8,9,110,572,2496,5762,3254,5020,117912, 307819,420394,677350,9611700,58689330,32290388, 430183260,180484980,5983159650,44850171444, 120220997328,235364198128,135740049556, 2107819739960,5252440129232,37484769529504, 125244830989069] |