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 | 1 |
| 1 | 2 |
| 2 | 65537 |
| 3 | 43046722 |
| 4 | 4294967297 |
| 5 | 152587890626 |
| 6 | 2821109907457 |
| 7 | 33232930569602 |
| 8 | 281474976710657 |
| 9 | 1853020188851842 |
| 10 | 10000000000000001 |
| 11 | 45949729863572162 |
| 12 | 184884258895036417 |
| 13 | 665416609183179842 |
| 14 | 2177953337809371137 |
| 15 | 6568408355712890626 |