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 | 16777216 |
| 2 | 8388608 |
| 3 | 5592405 |
| 4 | 4194304 |
| 5 | 3355443 |
| 6 | 2796202 |
| 7 | 2396745 |
| 8 | 2097152 |
| 9 | 1864135 |
| 10 | 1677721 |
| 11 | 1525201 |
| 12 | 1398101 |
| 13 | 1290555 |
| 14 | 1198372 |
| 15 | 1118481 |
| 16 | 1048576 |
| 17 | 986895 |
| 18 | 932067 |
| 19 | 883011 |
| 20 | 838860 |
| 21 | 798915 |
| 22 | 762600 |
| 23 | 729444 |
| 24 | 699050 |
| 25 | 671088 |
| 26 | 645277 |