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) |
|---|---|
| 5 | 1 |
| 6 | 2 |
| 7 | 6 |
| 8 | 15 |
| 9 | 39 |
| 10 | 99 |
| 11 | 258 |
| 12 | 671 |
| 13 | 1762 |
| 14 | 4657 |
| 15 | 12372 |
| 16 | 33036 |
| 17 | 88590 |
| 18 | 238483 |
| 19 | 644045 |
| 20 | 1744542 |
| 21 | 4737341 |
| 22 | 12894158 |
| 23 | 35165994 |
| 24 | 96083192 |
| 25 | 262951511 |
| 26 | 720685274 |
| 27 | 1977846334 |
| 28 | 5434588909 |
| 29 | 14949284828 |
| 30 | 41163690109 |
| 31 | 113451949753 |
| 32 | 312955174089 |
| 33 | 863965424349 |
| 34 | 2386874582238 |