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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 6 |
| 6 | 10 |
| 7 | 21 |
| 8 | 48 |
| 9 | 103 |
| 10 | 219 |
| 11 | 489 |
| 12 | 1114 |
| 13 | 2517 |
| 14 | 5712 |
| 15 | 13152 |
| 16 | 30492 |
| 17 | 70812 |
| 18 | 165165 |
| 19 | 387456 |
| 20 | 912378 |
| 21 | 2154250 |
| 22 | 5102343 |
| 23 | 12123027 |
| 24 | 28878384 |
| 25 | 68947041 |
| 26 | 164979006 |
| 27 | 395604531 |
| 28 | 950428335 |
| 29 | 2287387152 |
| 30 | 5514240673 |
| 31 | 13314167718 |
| 32 | 32194109193 |
| 33 | 77953239507 |
| 34 | 188997294360 |