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 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 3 |
| 5 | 27 |
| 6 | 29 |
| 7 | 121 |
| 8 | 31 |
| 9 | 503 |
| 10 | 507 |
| 11 | 2037 |
| 12 | 1021 |
| 13 | 8179 |
| 14 | 8185 |
| 15 | 32753 |
| 16 | 4095 |
| 17 | 131055 |
| 18 | 131063 |
| 19 | 524269 |
| 20 | 262139 |
| 21 | 2097131 |
| 22 | 2097141 |
| 23 | 8388585 |
| 24 | 2097149 |
| 25 | 33554407 |
| 26 | 33554419 |
| 27 | 134217701 |
| 28 | 67108857 |
| 29 | 536870883 |
| 30 | 536870897 |
| 31 | 2147483617 |
| 32 | 134217727 |
| 33 | 8589934559 |
| 34 | 8589934575 |
| 35 | 34359738333 |