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 | 2 |
| 2 | 7 |
| 3 | 18 |
| 4 | 50 |
| 5 | 134 |
| 6 | 359 |
| 7 | 958 |
| 8 | 2557 |
| 9 | 6818 |
| 10 | 18183 |
| 11 | 48490 |
| 12 | 129307 |
| 13 | 344820 |
| 14 | 919522 |
| 15 | 2452059 |
| 16 | 6538825 |
| 17 | 17436866 |
| 18 | 46498311 |
| 19 | 123995496 |
| 20 | 330654658 |
| 21 | 881745755 |
| 22 | 2351322014 |
| 23 | 6270192038 |
| 24 | 16720512102 |
| 25 | 44588032273 |
| 26 | 118901419396 |