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 | 8 |
| 2 | 17593 |
| 3 | 389112 |
| 4 | 3169562 |
| 5 | 15694600 |
| 6 | 57385803 |
| 7 | 170880248 |
| 8 | 438565492 |
| 9 | 1005601032 |
| 10 | 2110507325 |
| 11 | 4124403448 |
| 12 | 7599974478 |
| 13 | 13331249672 |
| 14 | 22425272527 |
| 15 | 36386743800 |
| 16 | 57216718568 |
| 17 | 87526438408 |
| 18 | 130667379777 |
| 19 | 190878599672 |
| 20 | 273452459650 |
| 21 | 384919809288 |
| 22 | 533255710163 |