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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 | 8 |
| 4 | 24 |
| 5 | 74 |
| 6 | 237 |
| 7 | 781 |
| 8 | 2630 |
| 9 | 9020 |
| 10 | 31375 |
| 11 | 110442 |
| 12 | 392685 |
| 13 | 1408249 |
| 14 | 5087870 |
| 15 | 18501347 |
| 16 | 67662072 |
| 17 | 248703832 |
| 18 | 918291072 |
| 19 | 3404396173 |
| 20 | 12667520643 |
| 21 | 47292077070 |
| 22 | 177093735411 |
| 23 | 665005047259 |
| 24 | 2503548413211 |
| 25 | 9447352502685 |
| 26 | 35728169464702 |
| 27 | 135390957971502 |
| 28 | 514026687891806 |
[0,1,3,8,24,74,237,781,2630,9020,31375,110442, 392685,1408249,5087870,18501347,67662072, 248703832,918291072,3404396173,12667520643, 47292077070,177093735411,665005047259, 2503548413211,9447352502685,35728169464702, 135390957971502,514026687891806] |