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 | 11 |
| 2 | 77 |
| 3 | 418 |
| 4 | 1925 |
| 5 | 7854 |
| 6 | 29183 |
| 7 | 100529 |
| 8 | 325193 |
| 9 | 997150 |
| 10 | 2919411 |
| 11 | 8207563 |
| 12 | 22259237 |
| 13 | 58454165 |
| 14 | 149104450 |
| 15 | 370410700 |
| 16 | 898202998 |
| 17 | 2130141651 |
| 18 | 4949034937 |
| 19 | 11281187225 |
| 20 | 25262712629 |
| 21 | 55641782779 |
| 22 | 120661583781 |
| 23 | 257862888360 |
| 24 | 543532730675 |
| 25 | 1130864017283 |