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) |
|---|---|
| 5 | 3 |
| 6 | 3 |
| 7 | 7 |
| 8 | 11 |
| 9 | 28 |
| 10 | 57 |
| 11 | 155 |
| 12 | 353 |
| 13 | 1003 |
| 14 | 2458 |
| 15 | 7214 |
| 16 | 18575 |
| 17 | 55880 |
| 18 | 149183 |
| 19 | 457639 |
| 20 | 1255933 |
| 21 | 3914103 |
| 22 | 10978240 |
| 23 | 34663182 |
| 24 | 98953078 |
| 25 | 315884786 |
| 26 | 915008430 |
| 27 | 2948378068 |
| 28 | 8645874055 |
| 29 | 28084475514 |
| 30 | 83222134020 |