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 | 2 |
| 2 | 1 |
| 3 | 14 |
| 4 | 1 |
| 5 | 62 |
| 6 | 3 |
| 7 | 254 |
| 8 | 17 |
| 9 | 1022 |
| 10 | 31 |
| 11 | 178 |
| 12 | 3 |
| 13 | 16382 |
| 14 | 5461 |
| 15 | 65534 |
| 16 | 257 |
| 17 | 262142 |
| 18 | 657 |
| 19 | 1048574 |
| 20 | 1271 |
| 21 | 4194302 |
| 22 | 60787 |
| 23 | 356962 |
| 24 | 12291 |
| 25 | 67108862 |
| 26 | 22369621 |
| 27 | 268435454 |
| 28 | 617093 |
| 29 | 1073741822 |
| 30 | 149943 |
| 31 | 4294967294 |
| 32 | 16843009 |
| 33 | 746950834 |
| 34 | 5726623061 |
| 35 | 967879954 |
| 36 | 981 |
| 37 | 274877906942 |