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 | 1 |
| 3 | 4 |
| 4 | 6 |
| 5 | 18 |
| 6 | 31 |
| 7 | 82 |
| 8 | 132 |
| 9 | 348 |
| 10 | 565 |
| 11 | 1480 |
| 12 | 2394 |
| 13 | 6270 |
| 14 | 10147 |
| 15 | 26566 |
| 16 | 42984 |
| 17 | 112536 |
| 18 | 182089 |
| 19 | 476716 |
| 20 | 771342 |
| 21 | 2019402 |
| 22 | 3267463 |
| 23 | 8554330 |
| 24 | 13841196 |
| 25 | 36236725 |
| 26 | 58632253 |
| 27 | 153501232 |
| 28 | 248370211 |
| 29 | 650241655 |