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 | 30 |
| 2 | 230 |
| 3 | 644 |
| 4 | 1308 |
| 5 | 2664 |
| 6 | 6850 |
| 7 | 10280 |
| 8 | 39693 |
| 9 | 44360 |
| 10 | 48919 |
| 11 | 218972 |
| 12 | 534078 |
| 13 | 2699915 |
| 14 | 526095 |
| 15 | 17233173 |
| 16 | 127890362 |
| 17 | 29138958036 |
| 18 | 146216247221 |
| 19 | 23671413563491 |
| 20 | 36966736685739 |