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 | 4 |
| 3 | 8 |
| 4 | 24 |
| 5 | 47 |
| 6 | 129 |
| 7 | 255 |
| 8 | 641 |
| 9 | 1308 |
| 10 | 3064 |
| 11 | 6225 |
| 12 | 14286 |
| 13 | 28792 |
| 14 | 63571 |
| 15 | 129240 |
| 16 | 278329 |
| 17 | 561044 |
| 18 | 1190501 |
| 19 | 2387695 |
| 20 | 4987250 |
| 21 | 9976529 |
| 22 | 20536591 |
| 23 | 40879937 |
| 24 | 83416195 |
| 25 | 165182927 |
| 26 | 333581057 |
| 27 | 658385847 |
| 28 | 1318764282 |
| 29 | 2590568669 |
| 30 | 5154370637 |
| 31 | 10082762399 |
| 32 | 19929958391 |
| 33 | 38848175389 |
| 34 | 76331335061 |
| 35 | 148233818041 |