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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 16 |
| 3 | 296 |
| 4 | 3229 |
| 5 | 27930 |
| 6 | 290787 |
| 7 | 3058275 |
| 8 | 30467160 |
| 9 | 307348931 |
| 10 | 3136679770 |
| 11 | 31792300100 |
| 12 | 321814932391 |
| 13 | 3265106426523 |
| 14 | 33117798943046 |
| 15 | 335719222714954 |
| 16 | 3404069403053140 |
| 17 | 34519198292461238 |
| 18 | 350010371192262630 |
[4,16,296,3229,27930,290787,3058275,30467160, 307348931,3136679770,31792300100,321814932391, 3265106426523,33117798943046,335719222714954, 3404069403053140,34519198292461238, 350010371192262630] |