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 | 2 |
| 3 | 2 |
| 4 | 7 |
| 5 | 14 |
| 6 | 43 |
| 7 | 130 |
| 8 | 446 |
| 9 | 1544 |
| 10 | 5773 |
| 11 | 22170 |
| 12 | 89356 |
| 13 | 370198 |
| 14 | 1591379 |
| 15 | 7020014 |
| 16 | 31922981 |
| 17 | 148679262 |
| 18 | 710828036 |
| 19 | 3474337098 |
| 20 | 17379964444 |
| 21 | 88739068866 |
| 22 | 462670294023 |
| 23 | 2458638559154 |
| 24 | 13317850411827 |
| 25 | 73432568553848 |
| 26 | 412120738922369 |
| 27 | 2351720323257872 |