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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 26 |
| 4 | 80 |
| 5 | 242 |
| 6 | 728 |
| 7 | 2186 |
| 8 | 6560 |
| 9 | 19682 |
| 10 | 59048 |
| 11 | 177146 |
| 12 | 531440 |
| 13 | 1594322 |
| 14 | 4782968 |
| 15 | 14348906 |
| 16 | 43046720 |
| 17 | 129140162 |
| 18 | 387420488 |
| 19 | 1162261466 |
| 20 | 3486784400 |
| 21 | 10460353202 |
| 22 | 31381059608 |
| 23 | 94143178826 |
| 24 | 282429536480 |
| 25 | 847288609442 |
[1,2,8,26,80,242,728,2186,6560,19682,59048,177146, 531440,1594322,4782968,14348906,43046720, 129140162,387420488,1162261466,3486784400, 10460353202,31381059608,94143178826,282429536480, 847288609442] |