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 | 3 |
| 3 | 5 |
| 4 | 13 |
| 5 | 22 |
| 6 | 48 |
| 7 | 88 |
| 8 | 184 |
| 9 | 342 |
| 10 | 684 |
| 11 | 1298 |
| 12 | 2556 |
| 13 | 4880 |
| 14 | 9506 |
| 15 | 18240 |
| 16 | 35366 |
| 17 | 67992 |
| 18 | 131446 |
| 19 | 253044 |
| 20 | 488532 |
| 21 | 941014 |
| 22 | 1815334 |
| 23 | 3497924 |
| 24 | 6745360 |
| 25 | 12999632 |
| 26 | 25063130 |
| 27 | 48306046 |
| 28 | 93123674 |
| 29 | 179492482 |
| 30 | 346003572 |
| 31 | 666925774 |
| 32 | 1285580868 |
| 33 | 2478002696 |
| 34 | 4776580902 |
| 35 | 9207090240 |