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 | 1 |
| 2 | 6 |
| 3 | 88 |
| 4 | 2489 |
| 5 | 112669 |
| 6 | 8204101 |
| 7 | 799422247 |
| 8 | 109633217402 |
| 9 | 19157475773052 |
| 10 | 4260985739868007 |
| 11 | 1161511740640164091 |
| 12 | 388990633971649889649 |
| 13 | 152369510393132343133762 |
| 14 | 70914541309488196549283707 |
| 15 | 38152280583855500772704976704 |
| 16 | 23639325145221113389859164367779 |