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 | 13 |
| 3 | 92 |
| 4 | 473 |
| 5 | 1982 |
| 6 | 7191 |
| 7 | 23431 |
| 8 | 70234 |
| 9 | 196941 |
| 10 | 522939 |
| 11 | 1327002 |
| 12 | 3240917 |
| 13 | 7660538 |
| 14 | 17602967 |
| 15 | 39466363 |
| 16 | 86593478 |
| 17 | 186399956 |
| 18 | 394478234 |
| 19 | 822229746 |
| 20 | 1690521204 |
| 21 | 3433033150 |
| 22 | 6893852746 |
| 23 | 13702694284 |
| 24 | 26982983126 |
| 25 | 52680389239 |