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) |
|---|---|
| 3 | 9 |
| 4 | 74 |
| 5 | 783 |
| 6 | 10266 |
| 7 | 161221 |
| 8 | 2955366 |
| 9 | 61999923 |
| 10 | 1465709426 |
| 11 | 38566299393 |
| 12 | 1118106929358 |
| 13 | 35418344328439 |
| 14 | 1217218474871946 |
| 15 | 45110603328226845 |
| 16 | 1793457963809111030 |
| 17 | 76142854603540048059 |
| 18 | 3438379224329923355106 |
| 19 | 164560036770068513241817 |
| 20 | 8320827788575162428573342 |