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 | 20 |
| 2 | 90 |
| 3 | 650 |
| 4 | 14762 |
| 5 | 28730 |
| 6 | 83810 |
| 7 | 130682 |
| 8 | 280370 |
| 9 | 708122 |
| 10 | 924482 |
| 11 | 1875530 |
| 12 | 4881890 |
| 13 | 7893290 |
| 14 | 12120842 |
| 15 | 13849562 |
| 16 | 20155610 |
| 17 | 25416722 |
| 18 | 28403570 |
| 19 | 38956322 |
| 20 | 47465210 |
| 21 | 62750162 |
| 22 | 88538690 |
| 23 | 104070602 |
| 24 | 112561490 |
| 25 | 141170042 |
| 26 | 163060130 |
| 27 | 260160770 |
| 28 | 294517082 |
| 29 | 352294130 |