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 | 4 |
| 2 | 26 |
| 3 | 226 |
| 4 | 2426 |
| 5 | 30826 |
| 6 | 451586 |
| 7 | 7489426 |
| 8 | 138722426 |
| 9 | 2839238026 |
| 10 | 63654973826 |
| 11 | 1551919194226 |
| 12 | 40888965122426 |
| 13 | 1157981114051626 |
| 14 | 35083865696279426 |
| 15 | 1132449247218851026 |
| 16 | 38800104353355372026 |
| 17 | 1406432065083818193226 |