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 | 3 |
| 2 | 4 |
| 3 | 10 |
| 4 | 12 |
| 5 | 25 |
| 6 | 545 |
| 7 | 589 |
| 8 | 2075 |
| 9 | 4883 |
| 10 | 7999 |
| 11 | 23074 |
| 12 | 31672 |
| 13 | 41958 |
| 14 | 904492 |
| 15 | 1356678 |
| 16 | 2738806 |
| 17 | 2774896 |
| 18 | 53721092 |
| 19 | 226271724 |
| 20 | 3775956307 |
| 21 | 15100042131 |
| 22 | 66836971558 |