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 | 215664901 |
| 2 | 593359399 |
| 3 | 235988057 |
| 4 | 362241739 |
| 5 | 739976449 |
| 6 | 337429373 |
| 7 | 733773767 |
| 8 | 670853233 |
| 9 | 146694029 |
| 10 | 151905877 |
| 11 | 267331399 |
| 12 | 413954911 |
| 13 | 984234877 |
| 14 | 384310939 |
| 15 | 310939973 |
| 16 | 939973613 |
| 17 | 306088933 |
| 18 | 759271351 |
| 19 | 549570661 |
| 20 | 789358679 |
| 21 | 725203621 |