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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 | 1 |
| 2 | 4 |
| 3 | 9 |
| 4 | 32 |
| 5 | 103 |
| 6 | 345 |
| 7 | 1275 |
| 8 | 4410 |
| 9 | 16741 |
| 10 | 61731 |
| 11 | 233495 |
| 12 | 902378 |
| 13 | 3437487 |
| 14 | 13553036 |
| 15 | 52676569 |
| 16 | 208717276 |
| 17 | 828362597 |
| 18 | 3294044819 |
| 19 | 13255061489 |
| 20 | 53113955276 |
| 21 | 215179562527 |
| 22 | 870783523200 |
| 23 | 3541185265429 |
| 24 | 14454981038936 |
| 25 | 59025273287545 |
| 26 | 242367745510571 |
| 27 | 994814873513383 |
| 28 | 4100366928340036 |
[1,1,4,9,32,103,345,1275,4410,16741,61731,233495, 902378,3437487,13553036,52676569,208717276, 828362597,3294044819,13255061489,53113955276, 215179562527,870783523200,3541185265429, 14454981038936,59025273287545,242367745510571, 994814873513383,4100366928340036] |