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 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 12 |
| 6 | 31 |
| 7 | 77 |
| 8 | 192 |
| 9 | 474 |
| 10 | 1170 |
| 11 | 2881 |
| 12 | 7097 |
| 13 | 17477 |
| 14 | 43050 |
| 15 | 106043 |
| 16 | 261235 |
| 17 | 643552 |
| 18 | 1585421 |
| 19 | 3905750 |
| 20 | 9621993 |
| 21 | 23704161 |
| 22 | 58396118 |
| 23 | 143860974 |
| 24 | 354406732 |
| 25 | 873093707 |
| 26 | 2150897733 |
| 27 | 5298813853 |
| 28 | 13053818630 |
| 29 | 32158552201 |
| 30 | 79223751853 |
| 31 | 195170567014 |
| 32 | 480809724213 |