The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 89 |
| 1 | 187 |
| 2 | 968 |
| 3 | 1837 |
| 4 | 9218 |
| 5 | 17347 |
| 6 | 91718 |
| 7 | 173437 |
| 8 | 907808 |
| 9 | 1716517 |
| 10 | 8872688 |
| 11 | 17735476 |
| 12 | 85189247 |
| 13 | 159487405 |
| 14 | 664272356 |
| 15 | 1317544822 |
| 16 | 3602001953 |
| 17 | 7193004016 |
| 18 | 13297007933 |
| 19 | 47267087164 |
| 20 | 93445163438 |
[89,187,968,1837,9218,17347,91718,173437,907808, 1716517,8872688,17735476,85189247,159487405, 664272356,1317544822,3602001953,7193004016, 13297007933,47267087164,93445163438] |