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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 12 |
| 4 | 84 |
| 5 | 120 |
| 6 | 330 |
| 7 | 504 |
| 8 | 1240 |
| 9 | 1332 |
| 10 | 2850 |
| 11 | 3696 |
| 12 | 5172 |
| 13 | 7176 |
| 14 | 10906 |
| 15 | 12660 |
| 16 | 19280 |
| 17 | 22440 |
| 18 | 28494 |
| 19 | 35796 |
| 20 | 46220 |
| 21 | 52752 |
| 22 | 68662 |
| 23 | 79488 |
| 24 | 91272 |
| 25 | 111000 |
| 26 | 136838 |
| 27 | 149472 |
| 28 | 181972 |
| 29 | 204972 |
| 30 | 229650 |
| 31 | 268212 |
| 32 | 317024 |
| 33 | 343860 |
| 34 | 404090 |
| 35 | 441420 |
| 36 | 496764 |
| 37 | 553224 |
| 38 | 636538 |
| 39 | 679224 |
| 40 | 776200 |
| 41 | 839844 |
| 42 | 914634 |
| 43 | 1017036 |
[1,4,12,84,120,330,504,1240,1332,2850,3696,5172, 7176,10906,12660,19280,22440,28494,35796,46220, 52752,68662,79488,91272,111000,136838,149472, 181972,204972,229650,268212,317024,343860,404090, 441420,496764,553224,636538,679224,776200,839844, 914634,1017036] |