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) |
|---|---|
| 1 | 392 |
| 2 | 864 |
| 3 | 3778 |
| 4 | 12500 |
| 5 | 39494 |
| 6 | 128998 |
| 7 | 461576 |
| 8 | 1468008 |
| 9 | 5004588 |
| 10 | 16267396 |
| 11 | 56289594 |
| 12 | 180787146 |
| 13 | 623643757 |
| 14 | 2013680076 |
| 15 | 6945409809 |
| 16 | 22381289794 |
| 17 | 77243050853 |
| 18 | 249062829770 |
| 19 | 859199611263 |
| 20 | 2770077481724 |
| 21 | 9558157038040 |