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 | 3 |
| 2 | 35 |
| 3 | 474 |
| 4 | 6891 |
| 5 | 104360 |
| 6 | 1623050 |
| 7 | 25718472 |
| 8 | 413215707 |
| 9 | 6710439939 |
| 10 | 109904635992 |
| 11 | 1812533851286 |
| 12 | 30064278051066 |
| 13 | 501094410251724 |
| 14 | 8386624585529736 |
| 15 | 140867399832201392 |
| 16 | 2373517896651329211 |