The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 20 |
| 2 | 24 |
| 3 | 204 |
| 4 | 224 |
| 5 | 240 |
| 6 | 242 |
| 7 | 402 |
| 8 | 420 |
| 9 | 422 |
| 10 | 1133 |
| 11 | 1313 |
| 12 | 1331 |
| 13 | 2004 |
| 14 | 2024 |
| 15 | 2040 |
| 16 | 2042 |
| 17 | 2204 |
| 18 | 2240 |
| 19 | 2400 |
| 20 | 2402 |
| 21 | 2420 |
| 22 | 3113 |
| 23 | 3131 |
| 24 | 3311 |
| 25 | 4002 |
| 26 | 4020 |
| 27 | 4022 |
| 28 | 4200 |
| 29 | 4202 |
| 30 | 4220 |
| 31 | 4899 |
| 32 | 4989 |
| 33 | 4998 |
| 34 | 5779 |
| 35 | 5797 |
| 36 | 5977 |
| 37 | 7579 |
| 38 | 7597 |
| 39 | 7759 |
| 40 | 7795 |
| 41 | 7957 |
| 42 | 7975 |
| 43 | 8499 |
| 44 | 8949 |
| 45 | 8994 |
[20,24,204,224,240,242,402,420,422,1133,1313,1331, 2004,2024,2040,2042,2204,2240,2400,2402,2420,3113, 3131,3311,4002,4020,4022,4200,4202,4220,4899,4989, 4998,5779,5797,5977,7579,7597,7759,7795,7957,7975, 8499,8949,8994] |