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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 22 |
| 3 | 353 |
| 4 | 5656 |
| 5 | 90496 |
| 6 | 1447939 |
| 7 | 23167027 |
| 8 | 370672441 |
| 9 | 5930759064 |
| 10 | 94892145032 |
| 11 | 1518274320519 |
| 12 | 24292389128308 |
| 13 | 388678226052937 |
| 14 | 6218851616847000 |
| 15 | 99501625869552009 |
| 16 | 1592026013912832148 |
| 17 | 25472416222605314376 |
| 18 | 407558659561685030020 |
| 19 | 6520938552986960480328 |
[1,22,353,5656,90496,1447939,23167027,370672441, 5930759064,94892145032,1518274320519, 24292389128308,388678226052937,6218851616847000, 99501625869552009,1592026013912832148, 25472416222605314376,407558659561685030020, 6520938552986960480328] |