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 | 2 |
| 2 | 5 |
| 3 | 11 |
| 4 | 27 |
| 5 | 58 |
| 6 | 176 |
| 7 | 366 |
| 8 | 1062 |
| 9 | 2571 |
| 10 | 7345 |
| 11 | 17540 |
| 12 | 47970 |
| 13 | 109375 |
| 14 | 272134 |
| 15 | 595031 |
| 16 | 1359839 |
| 17 | 2827311 |
| 18 | 6072251 |
| 19 | 12027150 |
| 20 | 24388681 |
| 21 | 46416427 |
| 22 | 89575530 |
| 23 | 164016985 |
| 24 | 303788687 |
| 25 | 537614351 |
| 26 | 959313275 |
| 27 | 1647205384 |