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 | 6 |
| 2 | 61 |
| 3 | 666 |
| 4 | 7321 |
| 5 | 80526 |
| 6 | 885781 |
| 7 | 9743586 |
| 8 | 107179441 |
| 9 | 1178973846 |
| 10 | 12968712301 |
| 11 | 142655835306 |
| 12 | 1569214188361 |
| 13 | 17261356071966 |
| 14 | 189874916791621 |
| 15 | 2088624084707826 |
| 16 | 22974864931786081 |
| 17 | 252723514249646886 |
| 18 | 2779958656746115741 |
| 19 | 30579545224207273146 |
| 20 | 336374997466280004601 |