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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 7 |
| 6 | 14 |
| 7 | 36 |
| 8 | 74 |
| 9 | 201 |
| 10 | 425 |
| 11 | 1178 |
| 12 | 2515 |
| 13 | 7063 |
| 14 | 15209 |
| 15 | 43088 |
| 16 | 93382 |
| 17 | 266236 |
| 18 | 579950 |
| 19 | 1661548 |
| 20 | 3634062 |
| 21 | 10451798 |
| 22 | 22935259 |
| 23 | 66170288 |
| 24 | 145601216 |
| 25 | 421164456 |
| 26 | 928875440 |
| 27 | 2692737120 |
| 28 | 5950570725 |
| 29 | 17282501978 |
| 30 | 38257352346 |
| 31 | 111292168834 |
| 32 | 246730727752 |
| 33 | 718763328317 |
| 34 | 1595578916923 |
| 35 | 4653944394630 |