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 | 5 |
| 3 | 43 |
| 4 | 469 |
| 5 | 6221 |
| 6 | 98041 |
| 7 | 1797559 |
| 8 | 37665881 |
| 9 | 888888889 |
| 10 | 23343682141 |
| 11 | 675462155171 |
| 12 | 21356578028941 |
| 13 | 732659790696133 |
| 14 | 27107717023577009 |
| 15 | 1076060070966390511 |
| 16 | 45619867383437689201 |
| 17 | 2057328526812890853617 |