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 | 8 |
| 2 | 26 |
| 3 | 73 |
| 4 | 196 |
| 5 | 518 |
| 6 | 1361 |
| 7 | 3568 |
| 8 | 9346 |
| 9 | 24473 |
| 10 | 64076 |
| 11 | 167758 |
| 12 | 439201 |
| 13 | 1149848 |
| 14 | 3010346 |
| 15 | 7881193 |
| 16 | 20633236 |
| 17 | 54018518 |
| 18 | 141422321 |
| 19 | 370248448 |
| 20 | 969323026 |
| 21 | 2537720633 |
| 22 | 6643838876 |
| 23 | 17393795998 |
| 24 | 45537549121 |
| 25 | 119218851368 |
| 26 | 312119004986 |
| 27 | 817138163593 |
| 28 | 2139295485796 |