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 | 0 |
| 1 | 131070 |
| 2 | 131071 |
| 3 | 262141 |
| 4 | 262142 |
| 5 | 393212 |
| 6 | 393213 |
| 7 | 524283 |
| 8 | 524284 |
| 9 | 655354 |
| 10 | 655355 |
| 11 | 786425 |
| 12 | 786426 |
| 13 | 917496 |
| 14 | 917497 |
| 15 | 1048567 |
| 16 | 1048568 |
| 17 | 1179638 |
| 18 | 1179639 |
| 19 | 1310709 |
| 20 | 1310710 |
| 21 | 1441780 |
| 22 | 1441781 |
| 23 | 1572851 |
| 24 | 1572852 |
| 25 | 1703922 |
| 26 | 1703923 |