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 | 5 |
| 2 | 41 |
| 3 | 441 |
| 4 | 5341 |
| 5 | 68845 |
| 6 | 922621 |
| 7 | 12701245 |
| 8 | 178338145 |
| 9 | 2542242545 |
| 10 | 36677022081 |
| 11 | 534311328705 |
| 12 | 7846771001041 |
| 13 | 116019251361041 |
| 14 | 1725360846921041 |
| 15 | 25786805857871441 |
| 16 | 387084441100423541 |
| 17 | 5832802431123111941 |