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 | 968 |
| 2 | 3692 |
| 3 | 14192 |
| 4 | 54560 |
| 5 | 209412 |
| 6 | 803246 |
| 7 | 3083292 |
| 8 | 11835664 |
| 9 | 45429680 |
| 10 | 174365744 |
| 11 | 669261344 |
| 12 | 2568836929 |
| 13 | 9859943512 |
| 14 | 37845226102 |
| 15 | 145260624176 |
| 16 | 557551963747 |
| 17 | 2140043779888 |
| 18 | 8214097736920 |
| 19 | 31528047115872 |
| 20 | 121013635650740 |