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 | 1 |
| 4 | 1 |
| 5 | 7 |
| 6 | 13 |
| 7 | 45 |
| 8 | 91 |
| 9 | 233 |
| 10 | 477 |
| 11 | 1079 |
| 12 | 2205 |
| 13 | 4709 |
| 14 | 10299 |
| 15 | 22393 |
| 16 | 52005 |
| 17 | 125055 |
| 18 | 310373 |
| 19 | 799677 |
| 20 | 2096699 |
| 21 | 5556681 |
| 22 | 14806685 |
| 23 | 39417431 |
| 24 | 104570549 |
| 25 | 276027337 |
| 26 | 724183555 |
| 27 | 1887993925 |
| 28 | 4891368373 |
| 29 | 12595644523 |
| 30 | 32252683453 |
| 31 | 82146468813 |
| 32 | 208225916203 |
| 33 | 525472131209 |