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 | 128 |
| 2 | 2048 |
| 3 | 16384 |
| 4 | 524288 |
| 5 | 4194304 |
| 6 | 67108864 |
| 7 | 536870912 |
| 8 | 34359738368 |
| 9 | 274877906944 |
| 10 | 4398046511104 |
| 11 | 35184372088832 |
| 12 | 1125899906842624 |
| 13 | 9007199254740992 |
| 14 | 144115188075855872 |
| 15 | 1152921504606846976 |