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 | 7 |
| 2 | 31 |
| 3 | 151 |
| 4 | 3049 |
| 5 | 7351 |
| 6 | 1741 |
| 7 | 19471 |
| 8 | 118801 |
| 9 | 498259 |
| 10 | 148531 |
| 11 | 406951 |
| 12 | 2513803 |
| 13 | 2339041 |
| 14 | 89089369 |
| 15 | 51662593 |
| 16 | 73451737 |
| 17 | 232301497 |
| 18 | 450988159 |
| 19 | 1558562197 |
| 20 | 2506152301 |
| 21 | 1444257673 |
| 22 | 28265029657 |
| 23 | 24061965043 |
| 24 | 87996684091 |
| 25 | 43553959717 |