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 | 1 |
| 2 | 10 |
| 3 | 19 |
| 4 | 46 |
| 5 | 31 |
| 6 | 235 |
| 7 | 631 |
| 8 | 1786 |
| 9 | 1999 |
| 10 | 7669 |
| 11 | 7039 |
| 12 | 12286 |
| 13 | 16381 |
| 14 | 180094 |
| 15 | 114679 |
| 16 | 949231 |
| 17 | 2086831 |
| 18 | 2883574 |
| 19 | 4175839 |
| 20 | 12480511 |
| 21 | 50329585 |
| 22 | 62898151 |
| 23 | 132638719 |
| 24 | 234618814 |
| 25 | 771743710 |
| 26 | 2883510271 |
| 27 | 4269733885 |
| 28 | 8254119871 |
| 29 | 17045499901 |
| 30 | 33214168831 |