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) |
|---|---|
| 0 | 4 |
| 1 | 20 |
| 2 | 260 |
| 3 | 1300 |
| 4 | 4100 |
| 5 | 10004 |
| 6 | 20740 |
| 7 | 38420 |
| 8 | 65540 |
| 9 | 104980 |
| 10 | 160004 |
| 11 | 234260 |
| 12 | 331780 |
| 13 | 456980 |
| 14 | 614660 |
| 15 | 810004 |
| 16 | 1048580 |
| 17 | 1336340 |
| 18 | 1679620 |
| 19 | 2085140 |
| 20 | 2560004 |
| 21 | 3111700 |
| 22 | 3748100 |
| 23 | 4477460 |
| 24 | 5308420 |
| 25 | 6250004 |
| 26 | 7311620 |
| 27 | 8503060 |
| 28 | 9834500 |
| 29 | 11316500 |
| 30 | 12960004 |
| 31 | 14776340 |