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 | 5 |
| 2 | 22 |
| 3 | 96 |
| 4 | 404 |
| 5 | 1556 |
| 6 | 5365 |
| 7 | 16585 |
| 8 | 46463 |
| 9 | 119452 |
| 10 | 285124 |
| 11 | 638247 |
| 12 | 1351194 |
| 13 | 2724385 |
| 14 | 5262379 |
| 15 | 9785590 |
| 16 | 17590461 |
| 17 | 30674359 |
| 18 | 52045522 |
| 19 | 86143170 |
| 20 | 139398464 |
| 21 | 220973442 |
| 22 | 343722465 |
| 23 | 525429159 |
| 24 | 790381435 |
| 25 | 1171358006 |
| 26 | 1712112000 |
| 27 | 2470450897 |