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 | 67 |
| 2 | 4421 |
| 3 | 291719 |
| 4 | 19249033 |
| 5 | 1270144459 |
| 6 | 83810285261 |
| 7 | 5530208682767 |
| 8 | 364909962777361 |
| 9 | 24078527334623059 |
| 10 | 1588817894122344533 |
| 11 | 104837902484740116119 |
| 12 | 6917712746098725319321 |
| 13 | 456464203340031130959067 |
| 14 | 30119719707695955917979101 |
| 15 | 1987445036504593059455661599 |