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 | 251 |
| 2 | 111497 |
| 3 | 74453 |
| 4 | 1397609 |
| 5 | 642427 |
| 6 | 5321191 |
| 7 | 23921257 |
| 8 | 55410683 |
| 9 | 400948369 |
| 10 | 253444777 |
| 11 | 1140813701 |
| 12 | 491525857 |
| 13 | 998051413 |
| 14 | 2060959049 |
| 15 | 4480114337 |
| 16 | 55140921491 |
| 17 | 38415872947 |
| 18 | 315392068463 |
| 19 | 15162919459 |
| 20 | 60600021611 |
| 21 | 278300877401 |
| 22 | 477836574947 |
| 23 | 1486135570643 |