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 | 11 |
| 2 | 43 |
| 3 | 211 |
| 4 | 419 |
| 5 | 739 |
| 6 | 1259 |
| 7 | 1427 |
| 8 | 4931 |
| 9 | 15619 |
| 10 | 22483 |
| 11 | 43283 |
| 12 | 83843 |
| 13 | 273643 |
| 14 | 373859 |
| 15 | 1543811 |
| 16 | 5364683 |
| 17 | 5769403 |
| 18 | 20942083 |
| 19 | 137650523 |
| 20 | 251523163 |
| 21 | 369353099 |
| 22 | 426009691 |
| 23 | 938379811 |
| 24 | 1042909163 |
| 25 | 1378015843 |
| 26 | 1878781763 |
| 27 | 11474651731 |
| 28 | 12402607739 |
| 29 | 15931940483 |
| 30 | 51025311059 |
| 31 | 144309633179 |