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| n | a(n) |
|---|---|
| 1 | 74 |
| 2 | 310 |
| 3 | 4730 |
| 4 | 10362 |
| 5 | 325418 |
| 6 | 677750 |
| 7 | 21958106 |
| 8 | 53790778 |
| 9 | 1439629634 |
| 10 | 4161478414 |
| 11 | 92041179386 |
| 12 | 304213814986 |
| 13 | 5765304183818 |
| 14 | 21169795378678 |
| 15 | 355195154002010 |
| 16 | 1417559402402490 |
| 17 | 21589075375711250 |
| 18 | 92135427005690030 |
[74,310,4730,10362,325418,677750,21958106, 53790778,1439629634,4161478414,92041179386, 304213814986,5765304183818,21169795378678, 355195154002010,1417559402402490, 21589075375711250,92135427005690030] |