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 | 29 |
| 4 | 353 |
| 5 | 5485 |
| 6 | 260323 |
| 7 | 15277779 |
| 8 | 3211933481 |
| 9 | 790502793321 |
| 10 | 751204032996623 |
| 11 | 808973740240335345 |
| 12 | 3499358510266725179221 |
| 13 | 16872857815987642169925097 |
| 14 | 333905047994165804391613820789 |
| 15 | 7308582206982080422190512432243395 |