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 | 3 |
| 3 | 10 |
| 4 | 27 |
| 5 | 74 |
| 6 | 176 |
| 7 | 431 |
| 8 | 987 |
| 9 | 2259 |
| 10 | 5025 |
| 11 | 11168 |
| 12 | 24351 |
| 13 | 53022 |
| 14 | 114204 |
| 15 | 245221 |
| 16 | 523173 |
| 17 | 1112996 |
| 18 | 2356796 |
| 19 | 4978235 |
| 20 | 10480426 |
| 21 | 22014499 |
| 22 | 46125601 |
| 23 | 96457248 |
| 24 | 201300980 |
| 25 | 419404740 |
| 26 | 872360898 |
| 27 | 1811883714 |
| 28 | 3757979313 |
| 29 | 7784511152 |