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 | 12 |
| 1 | 13 |
| 2 | 15 |
| 3 | 19 |
| 4 | 27 |
| 5 | 43 |
| 6 | 75 |
| 7 | 139 |
| 8 | 267 |
| 9 | 523 |
| 10 | 1035 |
| 11 | 2059 |
| 12 | 4107 |
| 13 | 8203 |
| 14 | 16395 |
| 15 | 32779 |
| 16 | 65547 |
| 17 | 131083 |
| 18 | 262155 |
| 19 | 524299 |
| 20 | 1048587 |
| 21 | 2097163 |
| 22 | 4194315 |
| 23 | 8388619 |
| 24 | 16777227 |
| 25 | 33554443 |
| 26 | 67108875 |
| 27 | 134217739 |
| 28 | 268435467 |
| 29 | 536870923 |
| 30 | 1073741835 |
| 31 | 2147483659 |
| 32 | 4294967307 |
| 33 | 8589934603 |
| 34 | 17179869195 |
| 35 | 34359738379 |