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 | 7 |
| 3 | 511 |
| 4 | 713 |
| 5 | 11023 |
| 6 | 15553 |
| 7 | 43873 |
| 8 | 81079 |
| 9 | 95263 |
| 10 | 323593 |
| 11 | 628153 |
| 12 | 2275183 |
| 13 | 6520633 |
| 14 | 6955513 |
| 15 | 7947583 |
| 16 | 10817233 |
| 17 | 12627943 |
| 18 | 14223823 |
| 19 | 15346303 |
| 20 | 19852423 |
| 21 | 27923663 |
| 22 | 28529473 |
| 23 | 29360527 |
| 24 | 31019623 |
| 25 | 39041863 |
| 26 | 41007823 |
| 27 | 79015273 |
| 28 | 134217727 |
| 29 | 143998193 |
| 30 | 213444943 |
| 31 | 227018383 |