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 | 0 |
| 1 | 26 |
| 2 | 238 |
| 3 | 1176 |
| 4 | 4200 |
| 5 | 12180 |
| 6 | 30492 |
| 7 | 68376 |
| 8 | 140712 |
| 9 | 270270 |
| 10 | 490490 |
| 11 | 848848 |
| 12 | 1410864 |
| 13 | 2264808 |
| 14 | 3527160 |
| 15 | 5348880 |
| 16 | 7922544 |
| 17 | 11490402 |
| 18 | 16353414 |
| 19 | 22881320 |
| 20 | 31523800 |
| 21 | 42822780 |
| 22 | 57425940 |
| 23 | 76101480 |
| 24 | 99754200 |
| 25 | 129442950 |
| 26 | 166399506 |
| 27 | 212048928 |
| 28 | 268031456 |
| 29 | 336226000 |