The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 27 |
| 2 | 737 |
| 3 | 909 |
| 4 | 1845 |
| 5 | 1912 |
| 6 | 7078 |
| 7 | 27412 |
| 8 | 90009 |
| 9 | 870129 |
| 10 | 990099 |
| 11 | 6852899 |
| 12 | 9090909 |
| 13 | 17388261 |
| 14 | 70168376 |
| 15 | 70787078 |
| 16 | 96096078 |
| 17 | 96707298 |
| 18 | 162533711 |
| 19 | 358006673 |
| 20 | 737737737 |
| 21 | 1050889491 |
| 22 | 2238028254 |
| 23 | 3281718034 |
| 24 | 4249370147 |
| 25 | 9009009009 |
| 26 | 11819327599 |
| 27 | 12178217823 |
| 28 | 13851266943 |
| 29 | 18768863945 |
[27,737,909,1845,1912,7078,27412,90009,870129, 990099,6852899,9090909,17388261,70168376,70787078, 96096078,96707298,162533711,358006673,737737737, 1050889491,2238028254,3281718034,4249370147, 9009009009,11819327599,12178217823,13851266943, 18768863945] |