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 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 13 |
| 5 | 21 |
| 6 | 35 |
| 7 | 71 |
| 8 | 169 |
| 9 | 409 |
| 10 | 931 |
| 11 | 1959 |
| 12 | 3829 |
| 13 | 7021 |
| 14 | 12203 |
| 15 | 20351 |
| 16 | 33233 |
| 17 | 55217 |
| 18 | 99043 |
| 19 | 201895 |
| 20 | 465501 |
| 21 | 1147717 |
| 22 | 2857075 |
| 23 | 6941815 |
| 24 | 16228985 |
| 25 | 36368201 |
| 26 | 78183171 |
| 27 | 161651143 |
| 28 | 322440517 |
| 29 | 622370973 |