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 | 966 |
| 4 | 4536 |
| 5 | 24304 |
| 6 | 111426 |
| 7 | 468348 |
| 8 | 1992996 |
| 9 | 8204200 |
| 10 | 32364700 |
| 11 | 126207438 |
| 12 | 485459784 |
| 13 | 1829249768 |
| 14 | 6809144730 |
| 15 | 25110435922 |
| 16 | 91539487000 |
| 17 | 330608108182 |
| 18 | 1185426647902 |
| 19 | 4218712592850 |
| 20 | 14911669509057 |
| 21 | 52409625818926 |