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 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 12 |
| 5 | 28 |
| 6 | 68 |
| 7 | 157 |
| 8 | 372 |
| 9 | 845 |
| 10 | 1949 |
| 11 | 4367 |
| 12 | 9880 |
| 13 | 21858 |
| 14 | 48679 |
| 15 | 106612 |
| 16 | 234546 |
| 17 | 509246 |
| 18 | 1109352 |
| 19 | 2391299 |
| 20 | 5167423 |
| 21 | 11070598 |
| 22 | 23762557 |
| 23 | 50641725 |
| 24 | 108085708 |
| 25 | 229303142 |
| 26 | 487039228 |
| 27 | 1029167119 |
| 28 | 2176808877 |
| 29 | 4583856878 |
| 30 | 9660020146 |
| 31 | 20279242545 |
| 32 | 42599286814 |