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 | 11 |
| 2 | 11141414111 |
| 3 | 11999199911 |
| 4 | 13111311131 |
| 5 | 1110110110111 |
| 6 | 1141411141411 |
| 7 | 1611116111161 |
| 8 | 3113113113113 |
| 9 | 3222223222223 |
| 10 | 3533355533353 |
| 11 | 7444477744447 |
| 12 | 7767777777677 |
| 13 | 7887787877887 |
| 14 | 7999979799997 |
| 15 | 9494994994949 |
| 16 | 9779999999779 |
| 17 | 118818181818811 |
| 18 | 131133131331131 |
| 19 | 944499494994449 |
| 20 | 10000010101000001 |