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 | 5 |
| 2 | 35 |
| 3 | 160 |
| 4 | 577 |
| 5 | 1816 |
| 6 | 5245 |
| 7 | 14288 |
| 8 | 37313 |
| 9 | 94384 |
| 10 | 232861 |
| 11 | 563080 |
| 12 | 1339249 |
| 13 | 3141464 |
| 14 | 7282493 |
| 15 | 16711456 |
| 16 | 38010625 |
| 17 | 85786336 |
| 18 | 192282301 |
| 19 | 428342936 |
| 20 | 948960881 |
| 21 | 2091908680 |
| 22 | 4590665245 |
| 23 | 10032774640 |
| 24 | 21843934657 |