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 | 1 |
| 1 | 72 |
| 2 | 1062 |
| 3 | 6696 |
| 4 | 26316 |
| 5 | 77688 |
| 6 | 189810 |
| 7 | 405720 |
| 8 | 785304 |
| 9 | 1408104 |
| 10 | 2376126 |
| 11 | 3816648 |
| 12 | 5885028 |
| 13 | 8767512 |
| 14 | 12684042 |
| 15 | 17891064 |
| 16 | 24684336 |
| 17 | 33401736 |
| 18 | 44426070 |
| 19 | 58187880 |
| 20 | 75168252 |
| 21 | 95901624 |
| 22 | 120978594 |
| 23 | 151048728 |
| 24 | 186823368 |
| 25 | 229078440 |
| 26 | 278657262 |
| 27 | 336473352 |
| 28 | 403513236 |