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 | 6 |
| 2 | 36 |
| 3 | 102 |
| 4 | 283 |
| 5 | 699 |
| 6 | 1526 |
| 7 | 3355 |
| 8 | 6888 |
| 9 | 13954 |
| 10 | 27816 |
| 11 | 54211 |
| 12 | 105147 |
| 13 | 201340 |
| 14 | 382799 |
| 15 | 723838 |
| 16 | 1359688 |
| 17 | 2544322 |
| 18 | 4740623 |
| 19 | 8801291 |
| 20 | 16292518 |
| 21 | 30071783 |
| 22 | 55371672 |
| 23 | 101727342 |
| 24 | 186506700 |
| 25 | 341316455 |
| 26 | 623552411 |
| 27 | 1137394900 |
| 28 | 2071676507 |