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 | 31 |
| 2 | 307 |
| 3 | 643 |
| 4 | 5113 |
| 5 | 21787 |
| 6 | 39199 |
| 7 | 360007 |
| 8 | 360007 |
| 9 | 4775569 |
| 10 | 10318249 |
| 11 | 10318249 |
| 12 | 65139031 |
| 13 | 387453811 |
| 14 | 913900417 |
| 15 | 2278522747 |
| 16 | 2741702809 |
| 17 | 25147657981 |
| 18 | 118748663779 |
| 19 | 156776294593 |
| 20 | 747206701687 |
| 21 | 1151810360731 |
| 22 | 1151810360731 |
| 23 | 1151810360731 |