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 | 10 |
| 5 | 22 |
| 6 | 52 |
| 7 | 131 |
| 8 | 358 |
| 9 | 1068 |
| 10 | 3390 |
| 11 | 11461 |
| 12 | 40964 |
| 13 | 153786 |
| 14 | 603927 |
| 15 | 2471798 |
| 16 | 10509270 |
| 17 | 46296937 |
| 18 | 210848414 |
| 19 | 990794383 |
| 20 | 4795761825 |
| 21 | 23875074600 |
| 22 | 122086530809 |
| 23 | 640484152252 |
| 24 | 3443478138871 |
| 25 | 18954259427121 |
| 26 | 106719731914780 |
| 27 | 614115134054991 |
| 28 | 3609008134177109 |