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 | 8 |
| 4 | 26 |
| 5 | 123 |
| 6 | 334 |
| 7 | 1295 |
| 8 | 3222 |
| 9 | 10172 |
| 10 | 25300 |
| 11 | 69258 |
| 12 | 161259 |
| 13 | 417582 |
| 14 | 925972 |
| 15 | 2200395 |
| 16 | 4794092 |
| 17 | 10769222 |
| 18 | 22543912 |
| 19 | 48728784 |
| 20 | 98926942 |