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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 8 |
| 9 | 9 |
| 10 | 101 |
| 11 | 121 |
| 12 | 212 |
| 13 | 232 |
| 14 | 323 |
| 15 | 343 |
| 16 | 434 |
| 17 | 454 |
| 18 | 545 |
| 19 | 565 |
| 20 | 656 |
| 21 | 676 |
| 22 | 767 |
| 23 | 787 |
| 24 | 878 |
| 25 | 898 |
| 26 | 989 |
| 27 | 10101 |
| 28 | 12121 |
| 29 | 12321 |
| 30 | 21012 |
| 31 | 21212 |
| 32 | 23232 |
| 33 | 23432 |
| 34 | 32123 |
| 35 | 32323 |
| 36 | 34343 |
| 37 | 34543 |
| 38 | 43234 |
| 39 | 43434 |
| 40 | 45454 |
| 41 | 45654 |
| 42 | 54345 |
| 43 | 54545 |
| 44 | 56565 |
| 45 | 56765 |
| 46 | 65456 |
| 47 | 65656 |