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 | 3 |
| 3 | 10 |
| 4 | 38 |
| 5 | 163 |
| 6 | 774 |
| 7 | 4004 |
| 8 | 22315 |
| 9 | 132836 |
| 10 | 838378 |
| 11 | 5574797 |
| 12 | 38861142 |
| 13 | 282951538 |
| 14 | 2146361911 |
| 15 | 16931303262 |
| 16 | 138694760316 |
| 17 | 1178400013929 |
| 18 | 10373294706788 |
| 19 | 94511288422822 |
| 20 | 890334527133081 |
| 21 | 8663213736312460 |
| 22 | 86975649078035438 |
| 23 | 899960154388259079 |
| 24 | 9586293761594853220 |