The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 11 |
| 2 | 106 |
| 3 | 370 |
| 4 | 3154 |
| 5 | 16790 |
| 6 | 119364 |
| 7 | 713260 |
| 8 | 4620694 |
| 9 | 28033122 |
| 10 | 174036890 |
| 11 | 1052524169 |
| 12 | 6409923762 |
| 13 | 38618278972 |
| 14 | 233193985046 |
| 15 | 1401840843777 |
| 16 | 8433815453844 |
| 17 | 50645668891739 |
| 18 | 304220519953548 |
| 19 | 1825994803261130 |
[11,106,370,3154,16790,119364,713260,4620694, 28033122,174036890,1052524169,6409923762, 38618278972,233193985046,1401840843777, 8433815453844,50645668891739,304220519953548, 1825994803261130] |