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 | 3 |
| 1 | 23 |
| 2 | 243 |
| 3 | 2663 |
| 4 | 29283 |
| 5 | 322103 |
| 6 | 3543123 |
| 7 | 38974343 |
| 8 | 428717763 |
| 9 | 4715895383 |
| 10 | 51874849203 |
| 11 | 570623341223 |
| 12 | 6276856753443 |
| 13 | 69045424287863 |
| 14 | 759499667166483 |
| 15 | 8354496338831303 |
| 16 | 91899459727144323 |
| 17 | 1010894056998587543 |
| 18 | 11119834626984462963 |