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 | 7 |
| 2 | 49 |
| 3 | 343 |
| 4 | 2380 |
| 5 | 16408 |
| 6 | 112476 |
| 7 | 767172 |
| 8 | 5209554 |
| 9 | 35236110 |
| 10 | 237479970 |
| 11 | 1595378190 |
| 12 | 10686193980 |
| 13 | 71386033740 |
| 14 | 475694666700 |
| 15 | 3162645548916 |
| 16 | 20982275486907 |
| 17 | 138930896958189 |
| 18 | 918219765681883 |
| 19 | 6058251819231325 |
| 20 | 39906814296599320 |