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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 42 |
| 5 | 45 |
| 6 | 1582 |
| 7 | 2953 |
| 8 | 104833 |
| 9 | 179105 |
| 10 | 6910335 |
| 11 | 12297363 |
| 12 | 463356818 |
| 13 | 842066129 |
| 14 | 31086653839 |
| 15 | 57898183793 |
| 16 | 2088249634569 |
| 17 | 3984107937241 |
| 18 | 140397984424512 |
| 19 | 274405097987979 |
| 20 | 9447509884713957 |
| 21 | 18914117934834161 |
[1,1,5,42,45,1582,2953,104833,179105,6910335, 12297363,463356818,842066129,31086653839, 57898183793,2088249634569,3984107937241, 140397984424512,274405097987979,9447509884713957, 18914117934834161] |