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 | 21 |
| 2 | 313 |
| 3 | 4065 |
| 4 | 49081 |
| 5 | 566721 |
| 6 | 6350473 |
| 7 | 69654225 |
| 8 | 751887961 |
| 9 | 8016991521 |
| 10 | 84652923433 |
| 11 | 886876310385 |
| 12 | 9231886792441 |
| 13 | 95586981129921 |
| 14 | 985282830165193 |
| 15 | 10117545471478545 |
| 16 | 103557909243290521 |
| 17 | 1057021183189581921 |