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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 | 1 |
| 4 | 1 |
| 5 | 13 |
| 6 | 19 |
| 7 | 595 |
| 8 | 1473 |
| 9 | 41647 |
| 10 | 139371 |
| 11 | 13954303 |
| 12 | 64086157 |
| 13 | 18839470495 |
| 14 | 119460750005 |
| 15 | 78516712094765 |
| 16 | 679135834059151 |
| 17 | 1132864641733411477 |
| 18 | 13390989972487068017 |
| 19 | 60598468634533341708705 |
| 20 | 981938713996881194950713 |
[1,1,1,1,13,19,595,1473,41647,139371,13954303, 64086157,18839470495,119460750005,78516712094765, 679135834059151,1132864641733411477, 13390989972487068017,60598468634533341708705, 981938713996881194950713] |