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 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 6 |
| 6 | 11 |
| 7 | 22 |
| 8 | 44 |
| 9 | 93 |
| 10 | 202 |
| 11 | 451 |
| 12 | 1033 |
| 13 | 2422 |
| 14 | 5792 |
| 15 | 14075 |
| 16 | 34734 |
| 17 | 86761 |
| 18 | 219188 |
| 19 | 558984 |
| 20 | 1437927 |
| 21 | 3726535 |
| 22 | 9723678 |
| 23 | 25525112 |
| 24 | 67374649 |
| 25 | 178723358 |
| 26 | 476263051 |
| 27 | 1274448596 |
| 28 | 3423491458 |
| 29 | 9229075121 |
| 30 | 24961961679 |
| 31 | 67721961268 |
| 32 | 184255943244 |
| 33 | 502658875034 |
| 34 | 1374713643212 |