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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 19 |
| 2 | 45 |
| 3 | 115 |
| 4 | 309 |
| 5 | 859 |
| 6 | 2445 |
| 7 | 7075 |
| 8 | 20709 |
| 9 | 61099 |
| 10 | 181245 |
| 11 | 539635 |
| 12 | 1610709 |
| 13 | 4815739 |
| 14 | 14414445 |
| 15 | 43177795 |
| 16 | 129402309 |
| 17 | 387944779 |
| 18 | 1163310045 |
| 19 | 3488881555 |
| 20 | 10464547509 |
| 21 | 31389448219 |
| 22 | 94159956045 |
| 23 | 282463090915 |
| 24 | 847355718309 |
| 25 | 2542000046059 |
[19,45,115,309,859,2445,7075,20709,61099,181245, 539635,1610709,4815739,14414445,43177795, 129402309,387944779,1163310045,3488881555, 10464547509,31389448219,94159956045,282463090915, 847355718309,2542000046059] |