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 | 0 |
| 2 | 2 |
| 3 | 3 |
| 4 | 14 |
| 5 | 30 |
| 6 | 119 |
| 7 | 301 |
| 8 | 1078 |
| 9 | 3036 |
| 10 | 10242 |
| 11 | 30624 |
| 12 | 100451 |
| 13 | 310128 |
| 14 | 1004817 |
| 15 | 3158343 |
| 16 | 10182982 |
| 17 | 32345186 |
| 18 | 104145896 |
| 19 | 332953929 |
| 20 | 1072383374 |
| 21 | 3442913407 |
| 22 | 11100120528 |
| 23 | 35742258497 |
| 24 | 115377720235 |
| 25 | 372326184555 |
| 26 | 1203406838428 |
| 27 | 3890040945078 |
| 28 | 12588182588373 |
| 29 | 40748118469180 |