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 | 2 |
| 3 | 6 |
| 4 | 16 |
| 5 | 25 |
| 6 | 60 |
| 7 | 127 |
| 8 | 244 |
| 9 | 494 |
| 10 | 1010 |
| 11 | 2015 |
| 12 | 4076 |
| 13 | 8086 |
| 14 | 16281 |
| 15 | 32818 |
| 16 | 65518 |
| 17 | 131059 |
| 18 | 262348 |
| 19 | 524448 |
| 20 | 1047643 |
| 21 | 2097675 |
| 22 | 4194133 |
| 23 | 8386693 |
| 24 | 16776916 |
| 25 | 33554390 |
| 26 | 67114125 |
| 27 | 134214652 |
| 28 | 268452748 |