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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 7 |
| 5 | 18 |
| 6 | 42 |
| 7 | 98 |
| 8 | 222 |
| 9 | 497 |
| 10 | 1100 |
| 11 | 2413 |
| 12 | 5250 |
| 13 | 11350 |
| 14 | 24398 |
| 15 | 52193 |
| 16 | 111180 |
| 17 | 235949 |
| 18 | 499074 |
| 19 | 1052502 |
| 20 | 2213710 |
| 21 | 4644833 |
| 22 | 9724492 |
| 23 | 20318637 |
| 24 | 42376578 |
| 25 | 88231765 |
| 26 | 183420748 |
| 27 | 380755932 |
| 28 | 789340736 |
| 29 | 1634339217 |
| 30 | 3379993922 |
| 31 | 6982618822 |
| 32 | 14410499598 |
| 33 | 29711523105 |