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) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 22 |
| 4 | 54 |
| 5 | 116 |
| 6 | 232 |
| 7 | 443 |
| 8 | 821 |
| 9 | 1490 |
| 10 | 2664 |
| 11 | 4710 |
| 12 | 8256 |
| 13 | 14373 |
| 14 | 24883 |
| 15 | 42878 |
| 16 | 73594 |
| 17 | 125880 |
| 18 | 214664 |
| 19 | 365087 |
| 20 | 619425 |
| 21 | 1048666 |
| 22 | 1771852 |
| 23 | 2988362 |
| 24 | 5031744 |
| 25 | 8459401 |
| 26 | 14201887 |
| 27 | 23811238 |
| 28 | 39873726 |
| 29 | 66695420 |
| 30 | 111440104 |
| 31 | 186016835 |