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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 250 |
| 2 | 2662 |
| 3 | 13718 |
| 4 | 48778 |
| 5 | 137842 |
| 6 | 332750 |
| 7 | 715822 |
| 8 | 1409938 |
| 9 | 2590058 |
| 10 | 4496182 |
| 11 | 7447750 |
| 12 | 11859482 |
| 13 | 18258658 |
| 14 | 27303838 |
| 15 | 39805022 |
| 16 | 56745250 |
| 17 | 79303642 |
| 18 | 108879878 |
| 19 | 147120118 |
| 20 | 195944362 |
| 21 | 257575250 |
| 22 | 334568302 |
| 23 | 429843598 |
| 24 | 546718898 |
[2,250,2662,13718,48778,137842,332750,715822, 1409938,2590058,4496182,7447750,11859482,18258658, 27303838,39805022,56745250,79303642,108879878, 147120118,195944362,257575250,334568302,429843598, 546718898] |