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| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | 16 |
| 4 | 6 |
| 5 | 90 |
| 6 | 52 |
| 7 | 20 |
| 8 | 448 |
| 9 | 306 |
| 10 | 180 |
| 11 | 70 |
| 12 | 2100 |
| 13 | 1568 |
| 14 | 1086 |
| 15 | 644 |
| 16 | 252 |
| 17 | 9504 |
| 18 | 7500 |
| 19 | 5664 |
| 20 | 3948 |
| 21 | 2352 |
| 22 | 924 |
| 23 | 42042 |
| 24 | 34452 |
| 25 | 27450 |
| 26 | 20840 |
| 27 | 14580 |
| 28 | 8712 |
| 29 | 3432 |
| 30 | 183040 |
| 31 | 154154 |
| 32 | 127380 |
| 33 | 101950 |
| 34 | 77640 |
| 35 | 54450 |
| 36 | 32604 |
| 37 | 12870 |
| 38 | 787644 |
| 39 | 677248 |
| 40 | 574574 |
| 41 | 476652 |
| 42 | 382510 |
| 43 | 291896 |
| 44 | 205062 |
| 45 | 122980 |
| 46 | 48620 |
[2,16,6,90,52,20,448,306,180,70,2100,1568,1086, 644,252,9504,7500,5664,3948,2352,924,42042,34452, 27450,20840,14580,8712,3432,183040,154154,127380, 101950,77640,54450,32604,12870,787644,677248, 574574,476652,382510,291896,205062,122980,48620] |