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 | 2 |
| 2 | 5 |
| 3 | 14 |
| 4 | 38 |
| 5 | 92 |
| 6 | 216 |
| 7 | 518 |
| 8 | 1165 |
| 9 | 2641 |
| 10 | 5981 |
| 11 | 13215 |
| 12 | 28880 |
| 13 | 62481 |
| 14 | 133539 |
| 15 | 281878 |
| 16 | 595867 |
| 17 | 1257995 |
| 18 | 2656439 |
| 19 | 5585174 |
| 20 | 11751388 |
| 21 | 24708442 |
| 22 | 51644779 |
| 23 | 107729838 |
| 24 | 224507391 |
| 25 | 467923765 |
| 26 | 971364960 |
| 27 | 2016542071 |