This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 113 |
| 2 | 223 |
| 3 | 443 |
| 4 | 773 |
| 5 | 883 |
| 6 | 10103 |
| 7 | 11113 |
| 8 | 14143 |
| 9 | 25253 |
| 10 | 26263 |
| 11 | 28283 |
| 12 | 32323 |
| 13 | 35353 |
| 14 | 41413 |
| 15 | 50503 |
| 16 | 61613 |
| 17 | 68683 |
| 18 | 71713 |
| 19 | 77773 |
| 20 | 80803 |
| 21 | 83833 |
| 22 | 85853 |
| 23 | 88883 |
| 24 | 97973 |
| 25 | 1001003 |
| 26 | 1011013 |
| 27 | 1101103 |
| 28 | 1131133 |
| 29 | 1161163 |
| 30 | 1181183 |
| 31 | 1221223 |
| 32 | 1241243 |
| 33 | 1281283 |
| 34 | 1331333 |
| 35 | 1361363 |
| 36 | 1391393 |