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| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | 6 |
| 4 | 24 |
| 5 | 72 |
| 6 | 172 |
| 7 | 352 |
| 8 | 646 |
| 9 | 1094 |
| 10 | 1742 |
| 11 | 2642 |
| 12 | 3852 |
| 13 | 5436 |
| 14 | 7464 |
| 15 | 10012 |
| 16 | 13162 |
| 17 | 17002 |
| 18 | 21626 |
| 19 | 27134 |
| 20 | 33632 |
| 21 | 41232 |
| 22 | 50052 |
| 23 | 60216 |
| 24 | 71854 |
| 25 | 85102 |
| 26 | 100102 |
| 27 | 117002 |
| 28 | 135956 |
| 29 | 157124 |
| 30 | 180672 |
| 31 | 206772 |
| 32 | 235602 |
| 33 | 267346 |
| 34 | 302194 |
| 35 | 340342 |
| 36 | 381992 |
| 37 | 427352 |
| 38 | 476636 |
[2,6,24,72,172,352,646,1094,1742,2642,3852,5436, 7464,10012,13162,17002,21626,27134,33632,41232, 50052,60216,71854,85102,100102,117002,135956, 157124,180672,206772,235602,267346,302194,340342, 381992,427352,476636] |