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 | 8 |
| 4 | 16 |
| 5 | 32 |
| 6 | 62 |
| 7 | 124 |
| 8 | 236 |
| 9 | 472 |
| 10 | 890 |
| 11 | 1780 |
| 12 | 3340 |
| 13 | 6680 |
| 14 | 12502 |
| 15 | 25004 |
| 16 | 46732 |
| 17 | 93464 |
| 18 | 174554 |
| 19 | 349108 |
| 20 | 651740 |
| 21 | 1303480 |
| 22 | 2432918 |
| 23 | 4865836 |
| 24 | 9080956 |
| 25 | 18161912 |
| 26 | 33892954 |
| 27 | 67785908 |
| 28 | 126494956 |
| 29 | 252989912 |
| 30 | 472095062 |
| 31 | 944190124 |
| 32 | 1761901676 |
| 33 | 3523803352 |
| 34 | 6575544410 |
| 35 | 13151088820 |