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 | 0 |
| 2 | 2 |
| 3 | 3 |
| 4 | 11 |
| 5 | 32 |
| 6 | 102 |
| 7 | 330 |
| 8 | 1059 |
| 9 | 3418 |
| 10 | 11023 |
| 11 | 35561 |
| 12 | 114744 |
| 13 | 370251 |
| 14 | 1194696 |
| 15 | 3854994 |
| 16 | 12439181 |
| 17 | 40138345 |
| 18 | 129517277 |
| 19 | 417922738 |
| 20 | 1348541219 |
| 21 | 4351434893 |
| 22 | 14041088118 |
| 23 | 45307389076 |
| 24 | 146196612400 |
| 25 | 471743129235 |
| 26 | 1522207498886 |
| 27 | 4911816468097 |