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 | 2 |
| 3 | 4 |
| 4 | 6 |
| 5 | 12 |
| 6 | 20 |
| 7 | 36 |
| 8 | 62 |
| 9 | 116 |
| 10 | 204 |
| 11 | 364 |
| 12 | 664 |
| 13 | 1220 |
| 14 | 2240 |
| 15 | 4132 |
| 16 | 7646 |
| 17 | 14244 |
| 18 | 26644 |
| 19 | 49984 |
| 20 | 94132 |
| 21 | 177788 |
| 22 | 336756 |
| 23 | 639720 |
| 24 | 1218228 |
| 25 | 2325048 |
| 26 | 4446776 |
| 27 | 8520928 |
| 28 | 16356260 |
| 29 | 31447436 |
| 30 | 60552616 |
| 31 | 116753948 |
| 32 | 225404486 |
| 33 | 435677408 |
| 34 | 843029104 |
| 35 | 1632918624 |
| 36 | 3165936640 |