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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 9 |
| 4 | 25 |
| 5 | 75 |
| 6 | 235 |
| 7 | 759 |
| 8 | 2521 |
| 9 | 8555 |
| 10 | 29503 |
| 11 | 103129 |
| 12 | 364547 |
| 13 | 1300819 |
| 14 | 4679471 |
| 15 | 16952161 |
| 16 | 61790441 |
| 17 | 226451035 |
| 18 | 833918839 |
| 19 | 3084255127 |
| 20 | 11451630043 |
| 21 | 42669225171 |
| 22 | 159497648599 |
| 23 | 597950875255 |
| 24 | 2247724108771 |
| 25 | 8470205600639 |
[0,1,3,9,25,75,235,759,2521,8555,29503,103129, 364547,1300819,4679471,16952161,61790441, 226451035,833918839,3084255127,11451630043, 42669225171,159497648599,597950875255, 2247724108771,8470205600639] |