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| n | a(n) |
|---|---|
| 1 | 6549 |
| 2 | 5087 |
| 3 | 10878 |
| 4 | 26996 |
| 5 | 86550 |
| 6 | 252110 |
| 7 | 727203 |
| 8 | 2385233 |
| 9 | 7252003 |
| 10 | 21530207 |
| 11 | 71430665 |
| 12 | 221511832 |
| 13 | 667563186 |
| 14 | 2234984052 |
| 15 | 7007535529 |
| 16 | 21309886921 |
| 17 | 71700419249 |
| 18 | 226330484881 |
| 19 | 692070910403 |
| 20 | 2335258232195 |
| 21 | 7403217685030 |
[6549,5087,10878,26996,86550,252110,727203, 2385233,7252003,21530207,71430665,221511832, 667563186,2234984052,7007535529,21309886921, 71700419249,226330484881,692070910403, 2335258232195,7403217685030] |