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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 17 |
| 3 | 75 |
| 4 | 321 |
| 5 | 1363 |
| 6 | 5777 |
| 7 | 24475 |
| 8 | 103681 |
| 9 | 439203 |
| 10 | 1860497 |
| 11 | 7881195 |
| 12 | 33385281 |
| 13 | 141422323 |
| 14 | 599074577 |
| 15 | 2537720635 |
| 16 | 10749957121 |
| 17 | 45537549123 |
| 18 | 192900153617 |
| 19 | 817138163595 |
| 20 | 3461452808001 |
| 21 | 14662949395603 |
| 22 | 62113250390417 |
| 23 | 263115950957275 |
| 24 | 1114577054219521 |
[1,3,17,75,321,1363,5777,24475,103681,439203, 1860497,7881195,33385281,141422323,599074577, 2537720635,10749957121,45537549123,192900153617, 817138163595,3461452808001,14662949395603, 62113250390417,263115950957275,1114577054219521] |