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 | 5 |
| 4 | 13 |
| 5 | 33 |
| 6 | 80 |
| 7 | 185 |
| 8 | 411 |
| 9 | 885 |
| 10 | 1862 |
| 11 | 3853 |
| 12 | 7881 |
| 13 | 15993 |
| 14 | 32284 |
| 15 | 64945 |
| 16 | 130359 |
| 17 | 261293 |
| 18 | 523282 |
| 19 | 1047397 |
| 20 | 2095781 |
| 21 | 4192721 |
| 22 | 8386792 |
| 23 | 16775145 |
| 24 | 33552083 |
| 25 | 67106213 |
| 26 | 134214750 |
| 27 | 268432125 |
| 28 | 536867201 |
| 29 | 1073737705 |
| 30 | 2147479092 |