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 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 7 |
| 5 | 15 |
| 6 | 25 |
| 7 | 37 |
| 8 | 100 |
| 9 | 229 |
| 10 | 454 |
| 11 | 811 |
| 12 | 1732 |
| 13 | 3777 |
| 14 | 7858 |
| 15 | 15339 |
| 16 | 31273 |
| 17 | 65536 |
| 18 | 136600 |
| 19 | 276535 |
| 20 | 562728 |
| 21 | 1159942 |
| 22 | 2400783 |
| 23 | 4918159 |
| 24 | 10052140 |
| 25 | 20627526 |
| 26 | 42480474 |
| 27 | 87254743 |
| 28 | 178855138 |
| 29 | 366854368 |