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 | 4 |
| 1 | 25 |
| 2 | 355 |
| 3 | 688 |
| 4 | 104348 |
| 5 | 208341 |
| 6 | 312689 |
| 7 | 521030 |
| 8 | 1146408 |
| 9 | 1980127 |
| 10 | 5419351 |
| 11 | 9692294 |
| 12 | 85563208 |
| 13 | 245850922 |
| 14 | 411557987 |
| 15 | 657408909 |
| 16 | 1480524883 |
| 17 | 3618458675 |
| 18 | 8717442233 |
| 19 | 21053343141 |
| 20 | 35938735828 |
| 21 | 1804419559672 |
| 22 | 5371151992734 |
| 23 | 8958937768937 |
| 24 | 14330089761671 |