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 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 8 |
| 6 | 15 |
| 7 | 35 |
| 8 | 72 |
| 9 | 169 |
| 10 | 388 |
| 11 | 934 |
| 12 | 2234 |
| 13 | 5508 |
| 14 | 13557 |
| 15 | 33883 |
| 16 | 85017 |
| 17 | 215091 |
| 18 | 546496 |
| 19 | 1396524 |
| 20 | 3582383 |
| 21 | 9228470 |
| 22 | 23852918 |
| 23 | 61857180 |
| 24 | 160871716 |
| 25 | 419516462 |
| 26 | 1096671326 |
| 27 | 2873403980 |
| 28 | 7544428973 |
| 29 | 19847520789 |
| 30 | 52308750878 |
| 31 | 138095728065 |
| 32 | 365153263313 |
| 33 | 966978876376 |