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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 253 |
| 2 | 5796 |
| 3 | 46620 |
| 4 | 213444 |
| 5 | 697788 |
| 6 | 1832292 |
| 7 | 4131036 |
| 8 | 8329860 |
| 9 | 15426684 |
| 10 | 26721828 |
| 11 | 43858332 |
| 12 | 68862276 |
| 13 | 104183100 |
| 14 | 152733924 |
| 15 | 217931868 |
| 16 | 303738372 |
| 17 | 414699516 |
| 18 | 555986340 |
| 19 | 733435164 |
| 20 | 953587908 |
| 21 | 1223732412 |
| 22 | 1551942756 |
| 23 | 1947119580 |
| 24 | 2419030404 |
| 25 | 2978349948 |
[1,253,5796,46620,213444,697788,1832292,4131036, 8329860,15426684,26721828,43858332,68862276, 104183100,152733924,217931868,303738372,414699516, 555986340,733435164,953587908,1223732412, 1551942756,1947119580,2419030404,2978349948] |