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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 | 4 |
| 3 | 10 |
| 4 | 20 |
| 5 | 42 |
| 6 | 84 |
| 7 | 196 |
| 8 | 392 |
| 9 | 842 |
| 10 | 1684 |
| 11 | 3878 |
| 12 | 7756 |
| 13 | 16786 |
| 14 | 33572 |
| 15 | 76846 |
| 16 | 153692 |
| 17 | 333998 |
| 18 | 667996 |
| 19 | 1523448 |
| 20 | 3046896 |
| 21 | 6639150 |
| 22 | 13278300 |
| 23 | 30206468 |
| 24 | 60412936 |
| 25 | 131892226 |
| 26 | 263784452 |
| 27 | 598952096 |
| 28 | 1197904192 |
| 29 | 2619074230 |
[1,2,4,10,20,42,84,196,392,842,1684,3878,7756, 16786,33572,76846,153692,333998,667996,1523448, 3046896,6639150,13278300,30206468,60412936, 131892226,263784452,598952096,1197904192, 2619074230] |