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 | 1 |
| 2 | 50 |
| 3 | 933 |
| 4 | 12465 |
| 5 | 119906 |
| 6 | 864705 |
| 7 | 4930446 |
| 8 | 23280925 |
| 9 | 94308983 |
| 10 | 336704397 |
| 11 | 1081565510 |
| 12 | 3176476119 |
| 13 | 8638660038 |
| 14 | 21978039571 |
| 15 | 52745266132 |
| 16 | 120228555981 |
| 17 | 261785061087 |
| 18 | 547126506745 |
| 19 | 1102086250237 |
| 20 | 2147107495684 |