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 | 8 |
| 2 | 16 |
| 3 | 74 |
| 4 | 260 |
| 5 | 1046 |
| 6 | 3974 |
| 7 | 15578 |
| 8 | 60242 |
| 9 | 234468 |
| 10 | 910060 |
| 11 | 3536762 |
| 12 | 13737348 |
| 13 | 53371468 |
| 14 | 207332364 |
| 15 | 805465810 |
| 16 | 3129084596 |
| 17 | 12156035112 |
| 18 | 47224200410 |
| 19 | 183458638422 |
| 20 | 712707497212 |
| 21 | 2768755861210 |
| 22 | 10756176540402 |
| 23 | 41786039888224 |