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 | 1024 |
| 2 | 2048 |
| 3 | 4096 |
| 4 | 131072 |
| 5 | 1048576 |
| 6 | 2097152 |
| 7 | 4194304 |
| 8 | 8388608 |
| 9 | 67108864 |
| 10 | 536870912 |
| 11 | 1073741824 |
| 12 | 274877906944 |
| 13 | 1099511627776 |
| 14 | 2199023255552 |
| 15 | 4398046511104 |
| 16 | 8796093022208 |
| 17 | 17592186044416 |
| 18 | 35184372088832 |
| 19 | 70368744177664 |
| 20 | 140737488355328 |
| 21 | 281474976710656 |
| 22 | 1125899906842624 |