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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 3 |
| 6 | 5 |
| 7 | 7 |
| 8 | 11 |
| 9 | 18 |
| 10 | 22 |
| 11 | 30 |
| 12 | 36 |
| 13 | 47 |
| 14 | 56 |
| 15 | 72 |
| 16 | 82 |
| 17 | 97 |
| 18 | 111 |
| 19 | 132 |
| 20 | 145 |
| 21 | 170 |
| 22 | 186 |
| 23 | 216 |
| 24 | 240 |
| 25 | 260 |
| 26 | 290 |
| 27 | 324 |
| 28 | 360 |
| 29 | 381 |
| 30 | 420 |