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 | 4 |
| 2 | 6 |
| 3 | 9 |
| 4 | 10 |
| 5 | 21 |
| 6 | 111 |
| 7 | 133 |
| 8 | 201 |
| 9 | 209 |
| 10 | 247 |
| 11 | 407 |
| 12 | 481 |
| 13 | 511 |
| 14 | 629 |
| 15 | 803 |
| 16 | 1011 |
| 17 | 1101 |
| 18 | 1141 |
| 19 | 1387 |
| 20 | 1417 |
| 21 | 1651 |
| 22 | 1679 |
| 23 | 1853 |
| 24 | 2119 |
| 25 | 2159 |
| 26 | 2353 |
| 27 | 2771 |
| 28 | 3031 |
| 29 | 3077 |
| 30 | 3097 |
| 31 | 3383 |
| 32 | 3439 |
| 33 | 3523 |
| 34 | 3749 |
| 35 | 3781 |
| 36 | 4577 |
| 37 | 4607 |
| 38 | 5149 |
| 39 | 5161 |
| 40 | 5219 |
| 41 | 5833 |
| 42 | 6331 |
| 43 | 6443 |
| 44 | 7033 |
| 45 | 7361 |
| 46 | 7501 |