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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 28 |
| 3 | 30 |
| 4 | 52 |
| 5 | 231 |
| 6 | 277 |
| 7 | 523 |
| 8 | 2278 |
| 9 | 22749 |
| 10 | 48854 |
| 11 | 371305 |
| 12 | 1447522 |
| 13 | 1726931 |
| 14 | 1947729 |
| 15 | 3657998 |
| 16 | 6964377 |
| 17 | 14393316 |
| 18 | 101963994 |
| 19 | 237690542 |
| 20 | 487815056 |
| 21 | 1525407389 |
| 22 | 2636206007 |
| 23 | 14146907176 |
| 24 | 2348836787752 |
| 25 | 5367069498863 |
| 26 | 1710637374747486 |
[1,28,30,52,231,277,523,2278,22749,48854,371305, 1447522,1726931,1947729,3657998,6964377,14393316, 101963994,237690542,487815056,1525407389, 2636206007,14146907176,2348836787752, 5367069498863,1710637374747486] |