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 | 11 |
| 3 | 91 |
| 4 | 633 |
| 5 | 3835 |
| 6 | 20755 |
| 7 | 102089 |
| 8 | 461272 |
| 9 | 1930310 |
| 10 | 7534742 |
| 11 | 27602968 |
| 12 | 95428291 |
| 13 | 312864361 |
| 14 | 976985630 |
| 15 | 2917175450 |
| 16 | 8357692894 |
| 17 | 23046527311 |
| 18 | 61337188725 |
| 19 | 157950527167 |
| 20 | 394427897066 |
| 21 | 957058104818 |
| 22 | 2260601179661 |
| 23 | 5206447640059 |
| 24 | 11709619965923 |
| 25 | 25752660738209 |