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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 8 |
| 5 | 16 |
| 6 | 29 |
| 7 | 59 |
| 8 | 124 |
| 9 | 287 |
| 10 | 670 |
| 11 | 1634 |
| 12 | 3992 |
| 13 | 9867 |
| 14 | 24320 |
| 15 | 60290 |
| 16 | 149124 |
| 17 | 370146 |
| 18 | 918796 |
| 19 | 2286685 |
| 20 | 5697484 |
| 21 | 14227797 |
| 22 | 35583724 |
| 23 | 89168380 |
| 24 | 223794690 |
| 25 | 562624780 |
| 26 | 1416520302 |
| 27 | 3571567951 |
| 28 | 9017077418 |
| 29 | 22794093212 |