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 | 0 |
| 2 | 1 |
| 3 | 70 |
| 4 | 1038 |
| 5 | 7398 |
| 6 | 35727 |
| 7 | 130768 |
| 8 | 400116 |
| 9 | 1062016 |
| 10 | 2531001 |
| 11 | 5529310 |
| 12 | 11272710 |
| 13 | 21639022 |
| 14 | 39559591 |
| 15 | 69283632 |
| 16 | 116910052 |
| 17 | 190977408 |
| 18 | 303286461 |
| 19 | 469431366 |
| 20 | 710400658 |
| 21 | 1053055398 |
| 22 | 1532253131 |
| 23 | 2192246528 |
| 24 | 3088876728 |
| 25 | 4290532688 |
| 26 | 5882825641 |
| 27 | 7969711934 |
| 28 | 10677299074 |
| 29 | 14156978846 |
| 30 | 18591603883 |
| 31 | 24195121104 |