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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 5 |
| 6 | 13 |
| 7 | 32 |
| 8 | 80 |
| 9 | 200 |
| 10 | 511 |
| 11 | 1323 |
| 12 | 3471 |
| 13 | 9183 |
| 14 | 24491 |
| 15 | 65715 |
| 16 | 177363 |
| 17 | 481135 |
| 18 | 1311340 |
| 19 | 3589023 |
| 20 | 9860254 |
| 21 | 27181835 |
| 22 | 75165194 |
| 23 | 208439742 |
| 24 | 579522977 |
| 25 | 1615093755 |
| 26 | 4511122964 |
| 27 | 12625881944 |
| 28 | 35405197065 |
| 29 | 99459085125 |
| 30 | 279861792874 |
| 31 | 788712430532 |
| 32 | 2226015529592 |