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 | 23 |
| 2 | 132 |
| 3 | 6049 |
| 4 | 17292 |
| 5 | 394703 |
| 6 | 2248092 |
| 7 | 204486353 |
| 8 | 290089932 |
| 9 | 6572546033 |
| 10 | 37162502652 |
| 11 | 1678097074579 |
| 12 | 4728061664172 |
| 13 | 106399222615163 |
| 14 | 597668556565212 |
| 15 | 107272376452106401 |
| 16 | 75103670464560012 |
| 17 | 1680355440510440093 |
| 18 | 9387056300571875772 |
| 19 | 419013082506039558709 |