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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 14 |
| 4 | 34 |
| 5 | 198 |
| 6 | 810 |
| 7 | 3706 |
| 8 | 16918 |
| 9 | 76318 |
| 10 | 347442 |
| 11 | 1575090 |
| 12 | 7148582 |
| 13 | 32438126 |
| 14 | 147179442 |
| 15 | 667843250 |
| 16 | 3030291798 |
| 17 | 13749921166 |
| 18 | 62390019330 |
| 19 | 283093420626 |
| 20 | 1284531566502 |
| 21 | 5828537726158 |
| 22 | 26446883611922 |
| 23 | 120002248379506 |
[0,2,14,34,198,810,3706,16918,76318,347442, 1575090,7148582,32438126,147179442,667843250, 3030291798,13749921166,62390019330,283093420626, 1284531566502,5828537726158,26446883611922, 120002248379506] |