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) |
|---|---|
| 4 | 3 |
| 5 | 25 |
| 6 | 155 |
| 7 | 1005 |
| 8 | 7488 |
| 9 | 64164 |
| 10 | 619986 |
| 11 | 6646750 |
| 12 | 78161249 |
| 13 | 999473835 |
| 14 | 13801761213 |
| 15 | 204631472475 |
| 16 | 3241541125110 |
| 17 | 54629642149630 |
| 18 | 975867376041308 |
| 19 | 18416844056075364 |
| 20 | 366128842105397631 |
| 21 | 7647337600268371485 |
| 22 | 167424323805645018159 |
| 23 | 3833790834030516355705 |
| 24 | 91641405910147125954428 |
| 25 | 2282611988081527293910920 |