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 | 7 |
| 2 | 37 |
| 3 | 203 |
| 4 | 1111 |
| 5 | 6083 |
| 6 | 33305 |
| 7 | 182349 |
| 8 | 998383 |
| 9 | 5466269 |
| 10 | 29928491 |
| 11 | 163862147 |
| 12 | 897165287 |
| 13 | 4912089625 |
| 14 | 26894291201 |
| 15 | 147249532159 |
| 16 | 806209189861 |
| 17 | 4414093873755 |
| 18 | 24167703582839 |
| 19 | 132321131623579 |
| 20 | 724474371929041 |