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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 | 8 |
| 2 | 39 |
| 3 | 152 |
| 4 | 513 |
| 5 | 1560 |
| 6 | 4382 |
| 7 | 11552 |
| 8 | 28899 |
| 9 | 69168 |
| 10 | 159372 |
| 11 | 355224 |
| 12 | 768885 |
| 13 | 1621296 |
| 14 | 3339201 |
| 15 | 6732232 |
| 16 | 13311450 |
| 17 | 25854744 |
| 18 | 49398043 |
| 19 | 92953016 |
| 20 | 172451760 |
| 21 | 315744072 |
| 22 | 570997539 |
| 23 | 1020691248 |
| 24 | 1804730732 |
| 25 | 3158323272 |
| 26 | 5473566645 |
| 27 | 9398873032 |
| 28 | 15998363307 |
| 29 | 27005721648 |
[1,8,39,152,513,1560,4382,11552,28899,69168, 159372,355224,768885,1621296,3339201,6732232, 13311450,25854744,49398043,92953016,172451760, 315744072,570997539,1020691248,1804730732, 3158323272,5473566645,9398873032,15998363307, 27005721648] |