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 | 4 |
| 3 | 12 |
| 4 | 34 |
| 5 | 84 |
| 6 | 199 |
| 7 | 436 |
| 8 | 919 |
| 9 | 1845 |
| 10 | 3590 |
| 11 | 6751 |
| 12 | 12384 |
| 13 | 22142 |
| 14 | 38797 |
| 15 | 66634 |
| 16 | 112540 |
| 17 | 187013 |
| 18 | 306421 |
| 19 | 495332 |
| 20 | 791131 |
| 21 | 1249153 |
| 22 | 1951915 |
| 23 | 3019969 |
| 24 | 4630063 |
| 25 | 7037286 |
| 26 | 10610240 |
| 27 | 15874998 |
| 28 | 23582081 |
| 29 | 34791668 |
| 30 | 50999319 |
| 31 | 74297620 |
| 32 | 107608848 |
| 33 | 154986104 |
| 34 | 222037997 |