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 | 2 |
| 2 | 22 |
| 3 | 242 |
| 4 | 2662 |
| 5 | 7986 |
| 6 | 45254 |
| 7 | 178354 |
| 8 | 854502 |
| 9 | 3670898 |
| 10 | 16741318 |
| 11 | 73862514 |
| 12 | 331879526 |
| 13 | 1476246706 |
| 14 | 6603168198 |
| 15 | 29445050162 |
| 16 | 131524950502 |
| 17 | 586945452786 |
| 18 | 2620665361094 |
| 19 | 11697730702834 |
| 20 | 52222780377702 |
| 21 | 233120598486578 |
| 22 | 1040691781127878 |
| 23 | 4645710145608114 |
| 24 | 20739029883622886 |
| 25 | 92580871368935026 |
| 26 | 413291071457721798 |