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) |
|---|---|
| 2 | 2 |
| 3 | 6 |
| 4 | 12 |
| 5 | 30 |
| 6 | 65 |
| 7 | 158 |
| 8 | 362 |
| 9 | 875 |
| 10 | 2064 |
| 11 | 4984 |
| 12 | 11914 |
| 13 | 28764 |
| 14 | 69155 |
| 15 | 166956 |
| 16 | 402372 |
| 17 | 971413 |
| 18 | 2343518 |
| 19 | 5657754 |
| 20 | 13654968 |
| 21 | 32966010 |
| 22 | 79577189 |
| 23 | 192116330 |
| 24 | 463786190 |
| 25 | 1119678911 |
| 26 | 2703086892 |
| 27 | 6525829036 |
| 28 | 15754607062 |
| 29 | 38034986040 |
| 30 | 91824246215 |
| 31 | 221683340568 |
| 32 | 535190123592 |