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 | 56 |
| 3 | 180 |
| 4 | 461 |
| 5 | 1040 |
| 6 | 2164 |
| 7 | 4246 |
| 8 | 7950 |
| 9 | 14308 |
| 10 | 24877 |
| 11 | 41945 |
| 12 | 68796 |
| 13 | 110045 |
| 14 | 172055 |
| 15 | 263449 |
| 16 | 395731 |
| 17 | 584031 |
| 18 | 847990 |
| 19 | 1212802 |
| 20 | 1710431 |
| 21 | 2381022 |
| 22 | 3274526 |
| 23 | 4452560 |
| 24 | 5990524 |
| 25 | 7979998 |
| 26 | 10531443 |
| 27 | 13777231 |
| 28 | 17875030 |
| 29 | 23011571 |
| 30 | 29406825 |
| 31 | 37318619 |