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 | 1521 |
| 1 | 858 |
| 2 | 1158 |
| 3 | 1170 |
| 4 | 2106 |
| 5 | 2976 |
| 6 | 5088 |
| 7 | 8520 |
| 8 | 17400 |
| 9 | 38400 |
| 10 | 88452 |
| 11 | 196924 |
| 12 | 228004 |
| 13 | 255836 |
| 14 | 255892 |
| 15 | 339948 |
| 16 | 708372 |
| 17 | 1392748 |
| 18 | 1392804 |
| 19 | 2631580 |
| 20 | 3684548 |
| 21 | 3684604 |
| 22 | 4502876 |
| 23 | 4502932 |
| 24 | 4630444 |
| 25 | 5343604 |
| 26 | 5343660 |
| 27 | 13185396 |
| 28 | 26489484 |