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) |
|---|---|
| 1 | 1 |
| 2 | 91 |
| 3 | 1891 |
| 4 | 3403 |
| 5 | 403651 |
| 6 | 4388203 |
| 7 | 4468555 |
| 8 | 41710411 |
| 9 | 201553003 |
| 10 | 213283531 |
| 11 | 410970115 |
| 12 | 428264011 |
| 13 | 633021571 |
| 14 | 642342403 |
| 15 | 703181251 |
| 16 | 4913725411 |
| 17 | 28007409475 |
| 18 | 41103462403 |
| 19 | 90151709131 |
| 20 | 90294438403 |
| 21 | 337594212451 |
| 22 | 443352832075 |
| 23 | 1452321801451 |
| 24 | 1483280069635 |
| 25 | 4435473488491 |