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) |
|---|---|
| 5 | 1 |
| 6 | 7 |
| 7 | 50 |
| 8 | 345 |
| 9 | 2392 |
| 10 | 16955 |
| 11 | 123707 |
| 12 | 932010 |
| 13 | 7260709 |
| 14 | 58509323 |
| 15 | 487593202 |
| 16 | 4199841037 |
| 17 | 37361858716 |
| 18 | 342989895895 |
| 19 | 3246458915947 |
| 20 | 31653980371254 |
| 21 | 317654338317380 |
| 22 | 3278058775976704 |
| 23 | 34757921507150964 |
| 24 | 378372365291381716 |
| 25 | 4225533329681577846 |
| 26 | 48375204740642752562 |