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 | 5 |
| 3 | 7 |
| 4 | 9 |
| 5 | 18 |
| 6 | 25 |
| 7 | 24 |
| 8 | 51 |
| 9 | 120 |
| 10 | 181 |
| 11 | 223 |
| 12 | 264 |
| 13 | 1243 |
| 14 | 1455 |
| 15 | 3129 |
| 16 | 5430 |
| 17 | 5616 |
| 18 | 7953 |
| 19 | 10534 |
| 20 | 10953 |
| 21 | 24115 |
| 22 | 24736 |
| 23 | 27910 |
| 24 | 49711 |
| 25 | 54109 |
| 26 | 57873 |
| 27 | 111090 |
| 28 | 215449 |
| 29 | 276096 |
| 30 | 329955 |
| 31 | 540039 |
| 32 | 1891903 |
| 33 | 2148379 |
| 34 | 3144261 |
| 35 | 3495451 |
| 36 | 7440328 |
| 37 | 7553209 |
| 38 | 17431240 |
| 39 | 33667044 |