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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 7 |
| 6 | 18 |
| 7 | 19 |
| 8 | 34 |
| 9 | 67 |
| 10 | 102 |
| 11 | 115 |
| 12 | 190 |
| 13 | 453 |
| 14 | 846 |
| 15 | 1305 |
| 16 | 2066 |
| 17 | 4139 |
| 18 | 7676 |
| 19 | 13511 |
| 20 | 23976 |
| 21 | 24381 |
| 22 | 24398 |
| 23 | 24399 |
| 24 | 97984 |
| 25 | 136629 |
| 26 | 196644 |
| 27 | 475235 |
| 28 | 926170 |
| 29 | 1466185 |
| 30 | 2817020 |
| 31 | 3850823 |
| 32 | 8348662 |
| 33 | 8466695 |
| 34 | 17694894 |
| 35 | 36130539 |
| 36 | 36130540 |
| 37 | 75209333 |
| 38 | 138765002 |
| 39 | 315446985 |
| 40 | 409493528 |
| 41 | 409493529 |