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 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 11 |
| 5 | 32 |
| 6 | 154 |
| 7 | 319 |
| 8 | 1184 |
| 9 | 7084 |
| 10 | 17864 |
| 11 | 79328 |
| 12 | 559636 |
| 13 | 1643488 |
| 14 | 8408768 |
| 15 | 67715956 |
| 16 | 225157856 |
| 17 | 1294950272 |
| 18 | 11647144432 |
| 19 | 43005150496 |
| 20 | 273234507392 |
| 21 | 2702137508224 |
| 22 | 10923308225984 |
| 23 | 75685958547584 |
| 24 | 813343389975424 |
| 25 | 3560998481670784 |
| 26 | 26641457408749568 |