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 | 14 |
| 2 | 196 |
| 3 | 720 |
| 4 | 2234 |
| 5 | 9568 |
| 6 | 36426 |
| 7 | 160652 |
| 8 | 666212 |
| 9 | 2958300 |
| 10 | 12763810 |
| 11 | 56890052 |
| 12 | 250429286 |
| 13 | 1120029716 |
| 14 | 4985081444 |
| 15 | 22367733696 |
| 16 | 100216967838 |
| 17 | 450974257968 |
| 18 | 2029310442178 |
| 19 | 9154744404876 |
| 20 | 41320179008364 |
| 21 | 186800175680348 |