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 | 3 |
| 5 | 8 |
| 6 | 14 |
| 7 | 36 |
| 8 | 70 |
| 9 | 177 |
| 10 | 372 |
| 11 | 942 |
| 12 | 2056 |
| 13 | 5222 |
| 14 | 11736 |
| 15 | 29878 |
| 16 | 68576 |
| 17 | 175038 |
| 18 | 408328 |
| 19 | 1044533 |
| 20 | 2468261 |
| 21 | 6326688 |
| 22 | 15107015 |
| 23 | 38791865 |
| 24 | 93432564 |
| 25 | 240296399 |
| 26 | 583001850 |
| 27 | 1501520574 |
| 28 | 3665682736 |
| 29 | 9452895693 |
| 30 | 23201772603 |
| 31 | 59899677902 |