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 | 1 |
| 2 | 258 |
| 3 | 7827 |
| 4 | 619773 |
| 5 | 31411948 |
| 6 | 1973546988 |
| 7 | 111496884663 |
| 8 | 6652506271144 |
| 9 | 385840008972355 |
| 10 | 22714686725936048 |
| 11 | 1326699809920740144 |
| 12 | 77815956863006419783 |
| 13 | 4553929883329302973354 |
| 14 | 266826017253691963185320 |
| 15 | 15623876956054896455317089 |
| 16 | 915167189151722925761420274 |