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| n | a(n) |
|---|---|
| 1 | 98 |
| 2 | 2420 |
| 3 | 29120 |
| 4 | 232432 |
| 5 | 1402082 |
| 6 | 6872424 |
| 7 | 28658242 |
| 8 | 104918592 |
| 9 | 344970188 |
| 10 | 1036183048 |
| 11 | 2880940360 |
| 12 | 7491977248 |
| 13 | 18376721948 |
| 14 | 42808972960 |
| 15 | 95252409300 |
| 16 | 203411012288 |
| 17 | 418599114270 |
| 18 | 833032325020 |
| 19 | 1607950467240 |
| 20 | 3018338301840 |
[98,2420,29120,232432,1402082,6872424,28658242, 104918592,344970188,1036183048,2880940360, 7491977248,18376721948,42808972960,95252409300, 203411012288,418599114270,833032325020, 1607950467240,3018338301840] |