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 | 3 |
| 2 | 73 |
| 3 | 757 |
| 4 | 4161 |
| 5 | 15751 |
| 6 | 46873 |
| 7 | 117993 |
| 8 | 262657 |
| 9 | 532171 |
| 10 | 1001001 |
| 11 | 1772893 |
| 12 | 2987713 |
| 13 | 4829007 |
| 14 | 7532281 |
| 15 | 11394001 |
| 16 | 16781313 |
| 17 | 24142483 |
| 18 | 34018057 |
| 19 | 47052741 |
| 20 | 64008001 |
| 21 | 85775383 |
| 22 | 113390553 |
| 23 | 148048057 |
| 24 | 191116801 |
| 25 | 244156251 |
| 26 | 308933353 |