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 | 4 |
| 4 | 9 |
| 5 | 22 |
| 6 | 57 |
| 7 | 155 |
| 8 | 439 |
| 9 | 1283 |
| 10 | 3837 |
| 11 | 11675 |
| 12 | 36013 |
| 13 | 112348 |
| 14 | 353836 |
| 15 | 1123431 |
| 16 | 3591616 |
| 17 | 11551046 |
| 18 | 37343096 |
| 19 | 121280307 |
| 20 | 395496997 |
| 21 | 1294457887 |
| 22 | 4250811199 |
| 23 | 14001176036 |
| 24 | 46243806379 |
| 25 | 153123238870 |
| 26 | 508207709138 |
| 27 | 1690355937970 |
| 28 | 5633580018286 |
| 29 | 18810483711103 |
| 30 | 62917378114528 |
| 31 | 210788885780702 |
| 32 | 707273100413094 |