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 | 19 |
| 4 | 169 |
| 5 | 1926 |
| 6 | 26839 |
| 7 | 442961 |
| 8 | 8459361 |
| 9 | 183642229 |
| 10 | 4468927451 |
| 11 | 120540804396 |
| 12 | 3570537526921 |
| 13 | 115246129602241 |
| 14 | 4026668668065135 |
| 15 | 151435858582831951 |
| 16 | 6100080207560938369 |
| 17 | 262054579034061036018 |