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) |
|---|---|
| 0 | 3 |
| 1 | 11 |
| 2 | 24 |
| 3 | 57 |
| 4 | 137 |
| 5 | 310 |
| 6 | 672 |
| 7 | 1445 |
| 8 | 3135 |
| 9 | 6834 |
| 10 | 14797 |
| 11 | 31605 |
| 12 | 66642 |
| 13 | 139500 |
| 14 | 291697 |
| 15 | 611517 |
| 16 | 1285388 |
| 17 | 2702278 |
| 18 | 5664348 |
| 19 | 11813505 |
| 20 | 24503911 |
| 21 | 50606865 |
| 22 | 104273395 |
| 23 | 214794252 |
| 24 | 442965900 |
| 25 | 914940122 |
| 26 | 1891691613 |
| 27 | 3910617099 |
| 28 | 8072908510 |
| 29 | 16626013425 |
| 30 | 34146007356 |
| 31 | 69946108176 |