The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 8 |
| 3 | 11 |
| 4 | 12 |
| 5 | 16 |
| 6 | 121 |
| 7 | 198 |
| 8 | 1717 |
| 9 | 1757 |
| 10 | 1797 |
| 11 | 1818 |
| 12 | 1837 |
| 13 | 1858 |
| 14 | 1877 |
| 15 | 1898 |
| 16 | 1938 |
| 17 | 1978 |
| 18 | 11011 |
| 19 | 17127 |
| 20 | 18018 |
| 21 | 18887 |
| 22 | 19998 |
| 23 | 111001 |
| 24 | 113201 |
| 25 | 115401 |
| 26 | 117601 |
| 27 | 119801 |
| 28 | 170217 |
| 29 | 170617 |
| 30 | 171017 |
| 31 | 171227 |
| 32 | 171417 |
| 33 | 171627 |
| 34 | 171817 |
| 35 | 172027 |
| 36 | 172427 |
| 37 | 172827 |
| 38 | 180018 |
| 39 | 180418 |
[4,8,11,12,16,121,198,1717,1757,1797,1818,1837, 1858,1877,1898,1938,1978,11011,17127,18018,18887, 19998,111001,113201,115401,117601,119801,170217, 170617,171017,171227,171417,171627,171817,172027, 172427,172827,180018,180418] |