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 | 4 |
| 3 | 7 |
| 4 | 16 |
| 5 | 26 |
| 6 | 52 |
| 7 | 100 |
| 8 | 200 |
| 9 | 394 |
| 10 | 788 |
| 11 | 1572 |
| 12 | 3144 |
| 13 | 6282 |
| 14 | 12564 |
| 15 | 25124 |
| 16 | 50248 |
| 17 | 100490 |
| 18 | 200980 |
| 19 | 401956 |
| 20 | 803912 |
| 21 | 1607818 |
| 22 | 3215636 |
| 23 | 6431268 |
| 24 | 12862536 |
| 25 | 25725066 |
| 26 | 51450132 |
| 27 | 102900260 |
| 28 | 205800520 |
| 29 | 411601034 |
| 30 | 823202068 |
| 31 | 1646404132 |
| 32 | 3292808264 |
| 33 | 6585616522 |
| 34 | 13171233044 |