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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 10 |
| 5 | 12 |
| 6 | 32 |
| 7 | 36 |
| 8 | 572 |
| 9 | 1991 |
| 10 | 20857 |
| 11 | 27432 |
| 12 | 28763 |
| 13 | 155122 |
| 14 | 190271 |
| 15 | 288108 |
| 16 | 484709 |
| 17 | 1395499 |
| 18 | 9370521 |
| 19 | 12918396 |
| 20 | 22646948 |
| 21 | 49496125 |
| 22 | 73469408 |
| 23 | 172128260 |
| 24 | 645676547 |
[1,2,4,10,12,32,36,572,1991,20857,27432,28763, 155122,190271,288108,484709,1395499,9370521, 12918396,22646948,49496125,73469408,172128260, 645676547] |