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 | 1 |
| 2 | 2 |
| 3 | 8 |
| 4 | 32 |
| 5 | 512 |
| 6 | 2048 |
| 7 | 32768 |
| 8 | 131072 |
| 9 | 2097152 |
| 10 | 134217728 |
| 11 | 536870912 |
| 12 | 34359738368 |
| 13 | 549755813888 |
| 14 | 2199023255552 |
| 15 | 35184372088832 |
| 16 | 2251799813685248 |
| 17 | 144115188075855872 |
| 18 | 576460752303423488 |
| 19 | 36893488147419103232 |
| 20 | 590295810358705651712 |
| 21 | 2361183241434822606848 |
| 22 | 151115727451828646838272 |