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| n | a(n) |
|---|---|
| 1 | 1940 |
| 2 | 12276 |
| 3 | 68892 |
| 4 | 380270 |
| 5 | 2285619 |
| 6 | 13917166 |
| 7 | 83440732 |
| 8 | 483431170 |
| 9 | 2925674836 |
| 10 | 17483477028 |
| 11 | 104684817992 |
| 12 | 614845832954 |
| 13 | 3705541301812 |
| 14 | 21989049700170 |
| 15 | 131802902193173 |
| 16 | 778701497200782 |
| 17 | 4678573664798165 |
| 18 | 27722845606940274 |
[1940,12276,68892,380270,2285619,13917166, 83440732,483431170,2925674836,17483477028, 104684817992,614845832954,3705541301812, 21989049700170,131802902193173,778701497200782, 4678573664798165,27722845606940274] |