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 | 37 |
| 2 | 5321 |
| 3 | 980407 |
| 4 | 201186025 |
| 5 | 43859522037 |
| 6 | 9939874413899 |
| 7 | 2314357836947571 |
| 8 | 549694303511409641 |
| 9 | 132569070434503802605 |
| 10 | 32360243622138480889321 |
| 11 | 7977001183875449759759807 |
| 12 | 1982402220908671654519130731 |
| 13 | 496031095735572731850517509727 |