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) |
|---|---|
| 0 | 3 |
| 1 | 8 |
| 2 | 15 |
| 3 | 16 |
| 4 | 105 |
| 5 | 128 |
| 6 | 315 |
| 7 | 256 |
| 8 | 3465 |
| 9 | 1024 |
| 10 | 9009 |
| 11 | 2048 |
| 12 | 45045 |
| 13 | 32768 |
| 14 | 109395 |
| 15 | 65536 |
| 16 | 2078505 |
| 17 | 262144 |
| 18 | 4849845 |
| 19 | 524288 |
| 20 | 22309287 |
| 21 | 4194304 |
| 22 | 50702925 |
| 23 | 8388608 |
| 24 | 456326325 |
| 25 | 33554432 |
| 26 | 1017958725 |
| 27 | 67108864 |