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 | 6 |
| 2 | 42 |
| 3 | 258 |
| 4 | 1044 |
| 5 | 3150 |
| 6 | 7806 |
| 7 | 16842 |
| 8 | 32808 |
| 9 | 59094 |
| 10 | 100050 |
| 11 | 161106 |
| 12 | 248892 |
| 13 | 371358 |
| 14 | 537894 |
| 15 | 759450 |
| 16 | 1048656 |
| 17 | 1419942 |
| 18 | 1889658 |
| 19 | 2476194 |
| 20 | 3200100 |
| 21 | 4084206 |
| 22 | 5153742 |
| 23 | 6436458 |
| 24 | 7962744 |
| 25 | 9765750 |
| 26 | 11881506 |
| 27 | 14349042 |
| 28 | 17210508 |
| 29 | 20511294 |