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 | 10 |
| 3 | 52 |
| 4 | 158 |
| 5 | 466 |
| 6 | 1192 |
| 7 | 2914 |
| 8 | 6722 |
| 9 | 14972 |
| 10 | 32286 |
| 11 | 67914 |
| 12 | 139824 |
| 13 | 282754 |
| 14 | 562970 |
| 15 | 1105892 |
| 16 | 2146846 |
| 17 | 4124258 |
| 18 | 7849496 |
| 19 | 14815202 |
| 20 | 27752338 |
| 21 | 51632620 |
| 22 | 95465502 |
| 23 | 175508250 |
| 24 | 320981472 |
| 25 | 584214530 |
| 26 | 1058602666 |
| 27 | 1910305300 |
| 28 | 3434059166 |
| 29 | 6151218034 |
| 30 | 10981579528 |