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 | 3 |
| 2 | 6 |
| 3 | 27 |
| 4 | 48 |
| 5 | 132 |
| 6 | 324 |
| 7 | 651 |
| 8 | 1491 |
| 9 | 3078 |
| 10 | 6447 |
| 11 | 12795 |
| 12 | 25839 |
| 13 | 50088 |
| 14 | 96099 |
| 15 | 184491 |
| 16 | 343920 |
| 17 | 640545 |
| 18 | 1173609 |
| 19 | 2138403 |
| 20 | 3850584 |
| 21 | 6882354 |
| 22 | 12186336 |
| 23 | 21423660 |
| 24 | 37421757 |
| 25 | 64816608 |
| 26 | 111637392 |
| 27 | 190976859 |
| 28 | 324868530 |
| 29 | 549265290 |
| 30 | 923904711 |
| 31 | 1545406077 |
| 32 | 2572326510 |